Chromatic sorting (#284)

* Test color palette extraction * Fix import * Add hex <> oklch conversions * Add 'hue' storage to photos * Consolidate color modules * Add chromatic config, track missing color data * Bump deps * Fix lens text test * Finalize color storage * Refactor color imports * Hide form color data when disabled * Store all average oklch color components * Finalize color-config language * Optimize photo syncing for color data * Only update color data when syncing if possible * Build out all color sorts * Debug image colors * Improve color debugging * Improve color logging * Simplify color sorting * Bump deps * Fix color sync logic * Switch to sort params: ascending, descending * Fix commandk sort menu * Update tr-tr sorting language * Add color capture to all photo extractions * Add color visualization to photo form * Standardize photo update language * Create global debug color update function * Improve color data capture logging * Update maximum function duration for admin photos * Add note to remove maxDuration * Use AI to generate sorting color * Conditionally use AI to analyze colors * Manage AI color analysis batched requests * Fix color reporting in admin photo table * Only update color where AI fields are missing * Temporarily upgrade admin/photos timeout * Fix pro-based max duration * Standardize color sorting foundations * Update color sorting language * Refactor color calculations * Restore max duration time * Update color-based sort menu labels * Finalize color documentation * Clean up color test actions * Round color sort values before submitting to db * Consolidate color server actions
2025-08-03 19:31:02 -05:00 · 2025-08-03 19:31:02 -05:00 · 59f5c74269
commit 59f5c74269
parent 8ba32c5549
68 changed files with 3116 additions and 2244 deletions
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@ -14,16 +14,17 @@
    "cmdk",
    "Consolas",
    "CredentialsSignin",
+    "culori",
    "datetime",
    "depluralize",
    "depluralizes",
    "Eterna",
    "exif",
    "exiftool",
-    "fieldset",
    "favicons",
    "Favoriting",
    "favs",
+    "fieldset",
    "ghijklmnopqrstuv",
    "GPSH",
    "Hasselblad",
@ -43,6 +44,7 @@
    "nanoids",
    "nextjs",
    "nowrap",
+    "Oklab",
    "oklch",
    "parameterizes",
    "presigner",
--- a/README.md
+++ b/README.md
@ -152,13 +152,17 @@ Application behavior can be changed by configuring the following environment var
    - `taken-at-oldest-first`
    - `uploaded-at`
    - `uploaded-at-oldest-first`
- `NEXT_PUBLIC_PRIORITY_BASED_SORTING = 1` takes priority field into account when sorting photos (⚠️ enabling may have performance consequences)
 - `NEXT_PUBLIC_NAV_SORT_CONTROL`
  - Controls sort UI on grid/full homepages
  - Accepted values:
    - `none`
    - `toggle` (default)
    - `menu`
+- Color-based sorting (experimental)
+  - `NEXT_PUBLIC_SORT_BY_COLOR = 1` enables color-based sorting (forces nav sort control to "menu," flags photos missing color data in admin dashboard)—color identification benefits greatly from AI being enabled
+  - `NEXT_PUBLIC_COLOR_SORT_STARTING_HUE` controls which colors start first (accepts a hue of 0 to 360, default: 80)
+  - `NEXT_PUBLIC_COLOR_SORT_CHROMA_CUTOFF` controls which colors are considered sufficiently vibrant (accepts a chroma of 0 to 0.37, default: 0.05):
+- `NEXT_PUBLIC_PRIORITY_BASED_SORTING = 1` takes priority field into account when sorting photos (⚠️ enabling may have performance consequences)


 #### Display
@ -286,13 +290,13 @@ Vercel Postgres can be switched to another Postgres-compatible, pooling provider
 Partial internationalization (for non-admin, user-facing text) provided for a handful of languages. Configure locale by setting environment variable `NEXT_PUBLIC_LOCALE`.

 ### Supported Languages
+- `bd-bn`
 - `en-us`
+- `id-id`
 - `pt-br`
 - `pt-pt`
- `id-id`
- `zh-cn`
- `bd-bn`
 - `tr-tr`
+- `zh-cn`

 To add support for a new language, open a PR following instructions in [/src/i18n/index.ts](https://github.com/sambecker/exif-photo-blog/blob/main/src/i18n/index.ts), using [en-us.ts](https://github.com/sambecker/exif-photo-blog/blob/main/src/i18n/locales/en-us.ts) as reference.

--- a/app/admin/photos/[photoId]/edit/page.tsx
+++ b/app/admin/photos/[photoId]/edit/page.tsx
@ -8,7 +8,7 @@ import {
 import { PATH_ADMIN } from '@/app/path';
 import PhotoEditPageClient from '@/photo/PhotoEditPageClient';
 import {
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
  BLUR_ENABLED,
  IS_PREVIEW,
 } from '@/app/config';
@ -36,10 +36,10 @@ export default async function PhotoEditPage({

  if (!photo) { redirect(PATH_ADMIN); }

-  const hasAiTextGeneration = AI_TEXT_GENERATION_ENABLED;
+  const hasAiTextGeneration = AI_CONTENT_GENERATION_ENABLED;
  
  // Only generate image thumbnails when AI generation is enabled
-  const imageThumbnailBase64 = AI_TEXT_GENERATION_ENABLED
+  const imageThumbnailBase64 = AI_CONTENT_GENERATION_ENABLED
    ? await resizeImageFromUrl(
      getNextImageUrlForManipulation(photo.url, IS_PREVIEW),
    )
--- a/app/admin/photos/page.tsx
+++ b/app/admin/photos/page.tsx
@ -1,12 +1,12 @@
 import { getStoragePhotoUrlsNoStore } from '@/platforms/storage/cache';
-import { getPhotos, getPhotosInNeedOfSyncCount } from '@/photo/db/query';
+import { getPhotos, getPhotosInNeedOfUpdateCount } from '@/photo/db/query';
 import { getPhotosMetaCached } from '@/photo/cache';
 import AdminPhotosClient from '@/admin/AdminPhotosClient';
 import { revalidatePath } from 'next/cache';
 import { cookies } from 'next/headers';
 import { TIMEZONE_COOKIE_NAME } from '@/utility/timezone';
 import {
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
  PRESERVE_ORIGINAL_UPLOADS,
 } from '@/app/config';

@ -34,7 +34,7 @@ export default async function AdminPhotosPage() {
    getPhotosMetaCached({ hidden: 'include'})
      .then(({ count }) => count)
      .catch(() => 0),
-    getPhotosInNeedOfSyncCount()
+    getPhotosInNeedOfUpdateCount()
      .catch(() => 0),
    DEBUG_PHOTO_BLOBS
      ? getStoragePhotoUrlsNoStore()
@ -47,7 +47,7 @@ export default async function AdminPhotosPage() {
      photosCount,
      photosCountNeedsSync,
      shouldResize: !PRESERVE_ORIGINAL_UPLOADS,
-      hasAiTextGeneration: AI_TEXT_GENERATION_ENABLED,
+      hasAiTextGeneration: AI_CONTENT_GENERATION_ENABLED,
      onLastUpload: async () => {
        'use server';
        // Update upload count in admin nav
--- a/app/admin/photos/updates/page.tsx
+++ b/app/admin/photos/updates/page.tsx
@ -1,17 +1,17 @@
-import AdminPhotosSyncClient from '@/admin/AdminPhotosSyncClient';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
-import { getPhotosInNeedOfSync } from '@/photo/db/query';
+import AdminPhotosUpdateClient from '@/admin/AdminPhotosUpdateClient';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
+import { getPhotosInNeedOfUpdate } from '@/photo/db/query';

 export const maxDuration = 60;

 export default async function AdminUpdatesPage() {
-  const photos = await getPhotosInNeedOfSync()
+  const photos = await getPhotosInNeedOfUpdate()
    .catch(() => []);

  return (
-    <AdminPhotosSyncClient {...{
+    <AdminPhotosUpdateClient {...{
      photos,
-      hasAiTextGeneration: AI_TEXT_GENERATION_ENABLED,
+      hasAiTextGeneration: AI_CONTENT_GENERATION_ENABLED,
    }} />
  );
 }
--- a/app/admin/uploads/[uploadPath]/page.tsx
+++ b/app/admin/uploads/[uploadPath]/page.tsx
@ -9,7 +9,7 @@ import {
 import UploadPageClient from '@/photo/UploadPageClient';
 import {
  AI_TEXT_AUTO_GENERATED_FIELDS,
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
  BLUR_ENABLED,
 } from '@/app/config';
 import ErrorNote from '@/components/ErrorNote';
@ -35,12 +35,12 @@ export default async function UploadPage({ params, searchParams }: Params) {
  } = await extractImageDataFromBlobPath(uploadPath, {
    includeInitialPhotoFields: true,
    generateBlurData: BLUR_ENABLED,
-    generateResizedImage: AI_TEXT_GENERATION_ENABLED,
+    generateResizedImage: AI_CONTENT_GENERATION_ENABLED,
  });

  const isDataMissing =
    !formDataFromExif ||
-    (AI_TEXT_GENERATION_ENABLED && !imageThumbnailBase64);
+    (AI_CONTENT_GENERATION_ENABLED && !imageThumbnailBase64);

  if (isDataMissing && !error) {
    // Only redirect if there's no error to report
@ -64,7 +64,7 @@ export default async function UploadPage({ params, searchParams }: Params) {
      : undefined,
  ]);

-  const hasAiTextGeneration = AI_TEXT_GENERATION_ENABLED;
+  const hasAiTextGeneration = AI_CONTENT_GENERATION_ENABLED;
  let textFieldsToAutoGenerate = AI_TEXT_AUTO_GENERATED_FIELDS;

  if (formDataFromExif) {
--- a/package.json
+++ b/package.json
@ -10,14 +10,14 @@
  },
  "dependencies": {
    "@ai-sdk/openai": "^1.3.23",
-    "@aws-sdk/client-s3": "3.848.0",
-    "@aws-sdk/s3-request-presigner": "3.848.0",
+    "@aws-sdk/client-s3": "3.857.0",
+    "@aws-sdk/s3-request-presigner": "3.857.0",
    "@radix-ui/react-dialog": "^1.1.14",
    "@radix-ui/react-dropdown-menu": "^2.1.15",
    "@radix-ui/react-tooltip": "^1.2.7",
    "@radix-ui/react-visually-hidden": "^1.2.3",
-    "@upstash/ratelimit": "^2.0.5",
-    "@upstash/redis": "^1.35.1",
+    "@upstash/ratelimit": "^2.0.6",
+    "@upstash/redis": "^1.35.3",
    "@vercel/analytics": "^1.5.0",
    "@vercel/blob": "^1.1.1",
    "@vercel/speed-insights": "^1.2.0",
@ -25,17 +25,20 @@
    "camelcase-keys": "^9.1.3",
    "clsx": "^2.1.1",
    "cmdk": "^1.1.1",
+    "culori": "^4.0.2",
    "date-fns": "^4.1.0",
    "date-fns-tz": "^3.2.0",
+    "extract-colors": "^4.2.0",
+    "fast-average-color": "^9.5.0",
    "fast-deep-equal": "^3.1.3",
-    "framer-motion": "^12.23.6",
+    "framer-motion": "^12.23.12",
    "nanoid": "^5.1.5",
-    "next": "15.4.2",
+    "next": "15.4.5",
    "next-auth": "5.0.0-beta.29",
    "next-themes": "^0.4.6",
    "pg": "^8.16.3",
-    "react": "19.1.0",
-    "react-dom": "19.1.0",
+    "react": "19.1.1",
+    "react-dom": "19.1.1",
    "react-icons": "^5.5.0",
    "sanitize-html": "^2.17.0",
    "sharp": "^0.34.3",
@ -47,26 +50,28 @@
  },
  "devDependencies": {
    "@eslint/eslintrc": "^3.3.1",
-    "@next/bundle-analyzer": "15.4.2",
-    "@next/eslint-plugin-next": "^15.4.2",
+    "@next/bundle-analyzer": "15.4.5",
+    "@next/eslint-plugin-next": "^15.4.5",
    "@tailwindcss/container-queries": "^0.1.1",
    "@tailwindcss/forms": "^0.5.10",
    "@tailwindcss/postcss": "^4.1.11",
-    "@testing-library/dom": "^10.4.0",
-    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/dom": "^10.4.1",
+    "@testing-library/jest-dom": "^6.6.4",
    "@testing-library/react": "^16.3.0",
+    "@types/culori": "^4.0.0",
    "@types/jest": "^30.0.0",
-    "@types/node": "^24.0.15",
-    "@types/pg": "^8.15.4",
-    "@types/react": "19.1.8",
-    "@types/react-dom": "19.1.6",
+    "@types/node": "^24.1.0",
+    "@types/pg": "^8.15.5",
+    "@types/react": "19.1.9",
+    "@types/react-dom": "19.1.7",
    "@types/sanitize-html": "^2.16.0",
    "cross-fetch": "^4.1.0",
-    "eslint": "9.31.0",
-    "eslint-config-next": "15.4.2",
+    "eslint": "9.32.0",
+    "eslint-config-next": "15.4.5",
    "eslint-plugin-react-hooks": "^5.2.0",
-    "jest": "^30.0.4",
-    "jest-environment-jsdom": "^30.0.4",
+    "jest": "^30.0.5",
+    "jest-environment-jsdom": "^30.0.5",
+    "knip": "^5.62.0",
    "postcss": "8.5.6",
    "tailwindcss": "4.1.11",
    "ts-node": "^10.9.2",
@ -76,6 +81,7 @@
    "onlyBuiltDependencies": [
      "@tailwindcss/oxide",
      "@vercel/speed-insights",
+      "oxc-resolver",
      "sharp",
      "unrs-resolver"
    ]
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/src/admin/AdminAppMenu.tsx
+++ b/src/admin/AdminAppMenu.tsx
@ -100,7 +100,7 @@ export default function AdminAppMenu({
      items.push({
        label: appText.admin.updatePlural,
        annotation: <>
-          <span className="mr-3">
+          <span className="mr-3 text-blue-500">
            {photosCountNeedSync}
          </span>
          <InsightsIndicatorDot
--- a/src/admin/AdminNavClient.tsx
+++ b/src/admin/AdminNavClient.tsx
@ -7,6 +7,7 @@ import Spinner from '@/components/Spinner';
 import {
  PATH_ADMIN_CONFIGURATION,
  PATH_ADMIN_INSIGHTS,
+  PATH_ADMIN_PHOTOS_UPDATES,
  checkPathPrefix,
  isPathAdminInfo,
  isPathTopLevelAdmin,
@ -60,7 +61,10 @@ export default function AdminNavClient({
    return () => clearInterval(interval);
  }, [updateTimes]);

-  const shouldShowBanner = hasRecentUpdates && isPathTopLevelAdmin(pathname);
+  const shouldShowBanner =
+    hasRecentUpdates &&
+    isPathTopLevelAdmin(pathname) &&
+    pathname !== PATH_ADMIN_PHOTOS_UPDATES;

  return (
    <AppGrid
--- a/src/admin/AdminPhotoMenu.tsx
+++ b/src/admin/AdminPhotoMenu.tsx
@ -30,7 +30,7 @@ import IconGrSync from '@/components/icons/IconGrSync';
 import InsightsIndicatorDot from './insights/InsightsIndicatorDot';
 import IconFavs from '@/components/icons/IconFavs';
 import IconEdit from '@/components/icons/IconEdit';
-import { photoNeedsToBeSynced } from '@/photo/sync';
+import { photoNeedsToBeUpdated } from '@/photo/update';
 import { KEY_COMMANDS } from '@/photo/key-commands';
 import { useAppText } from '@/i18n/state/client';
 import IconLock from '@/components/icons/IconLock';
@ -124,7 +124,7 @@ export default function AdminPhotoMenu({
      label: appText.admin.sync,
      labelComplex: <span className="inline-flex items-center gap-2">
        <span>{appText.admin.sync}</span>
-        {photoNeedsToBeSynced(photo) &&
+        {photoNeedsToBeUpdated(photo) &&
          <InsightsIndicatorDot
            colorOverride="blue"
            className="ml-1 translate-y-[1.5px]"
--- a/src/admin/AdminPhotosClient.tsx
+++ b/src/admin/AdminPhotosClient.tsx
@ -16,6 +16,7 @@ import { pluralize } from '@/utility/string';
 import IconBroom from '@/components/icons/IconBroom';
 import ResponsiveText from '@/components/primitives/ResponsiveText';
 import { useAppText } from '@/i18n/state/client';
+import SyncColorButton from '@/photo/color/SyncColorButton';

 export default function AdminPhotosClient({
  photos,
@ -28,6 +29,7 @@ export default function AdminPhotosClient({
  infiniteScrollInitial,
  infiniteScrollMultiple,
  timezone,
+  debugColorData,
 }: {
  photos: Photo[]
  photosCount: number
@ -39,6 +41,7 @@ export default function AdminPhotosClient({
  infiniteScrollInitial: number
  infiniteScrollMultiple: number
  timezone: Timezone
+  debugColorData?: boolean
 }) {
  const { uploadState: { isUploading } } = useAppState();

@ -56,6 +59,8 @@ export default function AdminPhotosClient({
                onLastUpload={onLastUpload}
              />
            </div>
+            {debugColorData &&
+              <SyncColorButton />}
            {photosCountNeedsSync > 0 &&
              <PathLoaderButton
                path={PATH_ADMIN_PHOTOS_UPDATES}
@ -67,7 +72,7 @@ export default function AdminPhotosClient({
                  pluralize(
                    photosCountNeedsSync,
                    appText.photo.photo,
-                    appText.photo.photoPlural,
+                    appText.photo.photoPlural.toLocaleLowerCase(),
                  ) +
                  ' missing data or AI-generated text'
                )}
@ -108,6 +113,7 @@ export default function AdminPhotosClient({
              photos={photos}
              hasAiTextGeneration={hasAiTextGeneration}
              timezone={timezone}
+              debugColorData={debugColorData}
            />
            {photosCount > photos.length &&
              <AdminPhotosTableInfinite
@ -115,6 +121,7 @@ export default function AdminPhotosClient({
                itemsPerPage={infiniteScrollMultiple}
                hasAiTextGeneration={hasAiTextGeneration}
                timezone={timezone}
+                debugColorData={debugColorData}
              />}
          </div>
        </div>}
--- a/src/admin/AdminPhotosTable.tsx
+++ b/src/admin/AdminPhotosTable.tsx
@ -14,10 +14,12 @@ import { RevalidatePhoto } from '@/photo/InfinitePhotoScroll';
 import PhotoSyncButton from './PhotoSyncButton';
 import DeletePhotoButton from './DeletePhotoButton';
 import { Timezone } from '@/utility/timezone';
-import Tooltip from '@/components/Tooltip';
-import { photoNeedsToBeSynced, getPhotoSyncStatusText } from '@/photo/sync';
+import { photoNeedsToBeUpdated } from '@/photo/update';
 import PhotoVisibilityIcon from '@/photo/visibility/PhotoVisibilityIcon';
 import { doesPhotoHaveDefaultVisibility } from '@/photo/visibility';
+import UpdateTooltip from '@/photo/update/UpdateTooltip';
+import PhotoColors from '@/photo/color/PhotoColors';
+import SyncColorButton from '@/photo/color/SyncColorButton';

 export default function AdminPhotosTable({
  photos,
@ -30,6 +32,8 @@ export default function AdminPhotosTable({
  canDelete = true,
  timezone,
  shouldScrollIntoViewOnExternalSync,
+  updateMode,
+  debugColorData,
 }: {
  photos: Photo[],
  onLastPhotoVisible?: () => void
@ -41,6 +45,9 @@ export default function AdminPhotosTable({
  canDelete?: boolean
  timezone?: Timezone
  shouldScrollIntoViewOnExternalSync?: boolean
+  // Only sync color data where possible
+  updateMode?: boolean
+  debugColorData?: boolean
 }) {
  const { invalidateSwr } = useAppState();

@ -78,6 +85,10 @@ export default function AdminPhotosTable({
                >
                  {titleForPhoto(photo, false)}
                </Link>
+                {debugColorData && photo.colorData &&
+                  <div>
+                    <PhotoColors colorData={photo.colorData} />
+                  </div>}
              </span>
              {!doesPhotoHaveDefaultVisibility(photo) &&
                <span className={clsx(
@ -86,16 +97,9 @@ export default function AdminPhotosTable({
                )}>
                  <PhotoVisibilityIcon photo={photo} />
                </span>}
-              {photoNeedsToBeSynced(photo) &&
+              {photoNeedsToBeUpdated(photo) &&
                <span>
-                  <Tooltip
-                    content={getPhotoSyncStatusText(photo)}
-                    classNameTrigger={clsx(
-                      'text-blue-600 dark:text-blue-400',
-                      'translate-y-[0.5px]',
-                    )}
-                    supportMobile
-                  />
+                  <UpdateTooltip photo={photo} />
                </span>}
              {photo.priorityOrder !== null &&
                <span className={clsx(
@ -134,7 +138,10 @@ export default function AdminPhotosTable({
              shouldToast
              shouldScrollIntoViewOnExternalSync={
                shouldScrollIntoViewOnExternalSync}
+              updateMode={updateMode}
            />
+            {debugColorData &&
+              <SyncColorButton photoId={photo.id} />}
            {canDelete &&
              <DeletePhotoButton
                photo={photo}
--- a/src/admin/AdminPhotosTableInfinite.tsx
+++ b/src/admin/AdminPhotosTableInfinite.tsx
@ -11,6 +11,7 @@ export default function AdminPhotosTableInfinite({
  hasAiTextGeneration,
  canEdit,
  canDelete,
+  debugColorData,
 }: {
  initialOffset: number
  itemsPerPage: number
@ -32,6 +33,7 @@ export default function AdminPhotosTableInfinite({
          hasAiTextGeneration={hasAiTextGeneration}
          canEdit={canEdit}
          canDelete={canDelete}
+          debugColorData={debugColorData}
        />}
    </InfinitePhotoScroll>
  );
--- a/src/admin/AdminPhotosUpdateClient.tsx
+++ b/src/admin/AdminPhotosUpdateClient.tsx
@ -2,22 +2,25 @@

 import { Photo } from '@/photo';
 import AdminPhotosTable from '@/admin/AdminPhotosTable';
-import IconGrSync from '@/components/icons/IconGrSync';
 import Note from '@/components/Note';
 import AdminChildPage from '@/components/AdminChildPage';
 import { PATH_ADMIN_PHOTOS } from '@/app/path';
-import { useMemo, useRef, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import { syncPhotosAction } from '@/photo/actions';
 import { useRouter } from 'next/navigation';
 import ResponsiveText from '@/components/primitives/ResponsiveText';
 import { LiaBroomSolid } from 'react-icons/lia';
 import ProgressButton from '@/components/primitives/ProgressButton';
 import ErrorNote from '@/components/ErrorNote';
-import { getPhotosSyncStatusText } from '@/photo/sync';
+import {
+  getPhotosUpdateStatusText,
+  isPhotoOnlyMissingColorData,
+} from '@/photo/update';
+import IconBroom from '@/components/icons/IconBroom';

 const SYNC_BATCH_SIZE_MAX = 3;

-export default function AdminPhotosSyncClient({
+export default function AdminPhotosUpdateClient({
  photos,
  hasAiTextGeneration,
 }: {
@ -37,7 +40,13 @@ export default function AdminPhotosSyncClient({

  const router = useRouter();

-  const statusText = useMemo(() => getPhotosSyncStatusText(photos), [photos]);
+  const statusText = useMemo(() => getPhotosUpdateStatusText(photos), [photos]);
+
+  useEffect(() => {
+    if (photos.length === 0 && !error && !errorRef.current) {
+      router.push(PATH_ADMIN_PHOTOS);
+    }
+  }, [photos.length, router, error]);

  return (
    <AdminChildPage
@ -48,12 +57,12 @@ export default function AdminPhotosSyncClient({
      </ResponsiveText>}
      accessory={<ProgressButton
        primary
-        icon={<IconGrSync className="translate-y-[1px]" />}
+        icon={<IconBroom size={18} />}
        hideText="never"
        progress={progress}
        tooltip={photos.length === 1
-          ? 'Sync data for 1 photo'
-          : `Sync data for all ${photos.length} photos`}
+          ? 'Update 1 photo'
+          : `Update all ${photos.length} photos`}
        onClick={async () => {
          if (window.confirm([
            'Are you sure you want to sync',
@ -69,7 +78,12 @@ export default function AdminPhotosSyncClient({
              const photoIds = photoIdsToSync.current
                .slice(0, SYNC_BATCH_SIZE_MAX);
              setPhotoIdsSyncing(photoIds);
-              await syncPhotosAction(photoIds)
+              await syncPhotosAction(photoIds.map(id => ({
+                photoId: id,
+                onlySyncColorData: isPhotoOnlyMissingColorData(
+                  photos.find(photo => photo.id === id),
+                ),
+              })))
                .then(() => {
                  photoIdsToSync.current = photoIdsToSync.current.filter(
                    id => !photoIds.includes(id),
@ -86,21 +100,17 @@ export default function AdminPhotosSyncClient({
                });
              if (errorRef.current) { break; }
            }
-            if (!errorRef.current) {
-              router.push(PATH_ADMIN_PHOTOS);
-            } else {
-              setProgress(0);
-              setPhotoIdsSyncing([]);
-              router.refresh();
-            }
+            setProgress(0);
+            setPhotoIdsSyncing([]);
+            router.refresh();
          }
        }}
        isLoading={arePhotoIdsSyncing}
        disabled={photoIdsSyncing.length > 0}
      >
        {arePhotoIdsSyncing
-          ? 'Syncing ...'
-          : 'Sync All'}
+          ? 'Updating ...'
+          : 'Update All'}
      </ProgressButton>}
    >
      <div className="space-y-6">
@ -133,6 +143,7 @@ export default function AdminPhotosSyncClient({
            canDelete={false}
            dateType="updatedAt"
            shouldScrollIntoViewOnExternalSync
+            updateMode
          />
        </div>
      </div>
--- a/src/admin/AdminUploadsTableRow.tsx
+++ b/src/admin/AdminUploadsTableRow.tsx
@ -106,6 +106,7 @@ export default function AdminUploadsTableRow({
        <div className="flex flex-col gap-6 w-full">
          <div className="flex flex-col grow gap-2">
            <FieldsetWithStatus
+              id={`title-${url}`}
              label="Title"
              value={draftTitle}
              onChange={titleUpdated =>
--- a/src/admin/PhotoSyncButton.tsx
+++ b/src/admin/PhotoSyncButton.tsx
@ -1,5 +1,5 @@
 import LoaderButton from '@/components/primitives/LoaderButton';
-import { syncPhotoAction } from '@/photo/actions';
+import { storeColorDataForPhotoAction, syncPhotoAction } from '@/photo/actions';
 import IconGrSync from '@/components/icons/IconGrSync';
 import { toastSuccess } from '@/toast';
 import { ComponentProps, useRef, useState } from 'react';
@ -8,10 +8,13 @@ import clsx from 'clsx/lite';
 import useScrollIntoView from '@/utility/useScrollIntoView';
 import { Photo } from '@/photo';
 import { syncPhotoConfirmText } from './confirm';
+import { isPhotoOnlyMissingColorData } from '@/photo/update';
+import IconBroom from '@/components/icons/IconBroom';

 export default function PhotoSyncButton({
  photo,
  onSyncComplete,
+  updateMode,
  className,
  isSyncingExternal,
  hasAiTextGeneration,
@ -22,6 +25,7 @@ export default function PhotoSyncButton({
 }: {
  photo: Photo
  onSyncComplete?: () => void
+  updateMode?: boolean
  isSyncingExternal?: boolean
  hasAiTextGeneration: boolean
  shouldConfirm?: boolean
@ -39,21 +43,34 @@ export default function PhotoSyncButton({
      shouldScrollIntoViewOnExternalSync,
  });

+  const onlySyncColorData = updateMode &&
+    isPhotoOnlyMissingColorData(photo);
+
  return (
-    <Tooltip content="Regenerate photo data">
+    <Tooltip content={onlySyncColorData
+      ? 'Update color data'
+      : 'Regenerate photo data'}>
      <LoaderButton
        ref={ref}
        className={clsx('scroll-mt-8', className)}
-        icon={<IconGrSync
-          className="translate-y-[0.5px] translate-x-[0.5px]"
-        />}
+        icon={updateMode
+          ? <IconBroom size={18} />
+          : <IconGrSync
+            className="translate-y-[0.5px] translate-x-[0.5px]"
+          />}
        onClick={() => {
          if (
            !shouldConfirm ||
-            window.confirm(syncPhotoConfirmText(photo, hasAiTextGeneration))
+            window.confirm(syncPhotoConfirmText(
+              photo,
+              hasAiTextGeneration,
+              onlySyncColorData,
+            ))
          ) {
            setIsSyncing(true);
-            syncPhotoAction(photo.id)
+            (onlySyncColorData
+              ? storeColorDataForPhotoAction
+              : syncPhotoAction)(photo.id)
              .then(() => {
                onSyncComplete?.();
                if (shouldToast) {
--- a/src/admin/actions.ts
+++ b/src/admin/actions.ts
@ -11,7 +11,7 @@ import {
  getPhotosMeta,
  getUniqueTags,
  getUniqueRecipes,
-  getPhotosInNeedOfSyncCount,
+  getPhotosInNeedOfUpdateCount,
 } from '@/photo/db/query';
 import {
  getGitHubMetaForCurrentApp,
@ -37,7 +37,7 @@ export const getAdminDataAction = async () =>
      getPhotosMeta({ hidden: 'only' })
        .then(({ count }) => count)
        .catch(() => 0),
-      getPhotosInNeedOfSyncCount(),
+      getPhotosInNeedOfUpdateCount(),
      getGitHubMetaForCurrentApp(),
      getStorageUploadUrlsNoStore()
        .then(urls => urls.length)
--- a/src/admin/config/AdminAppConfigurationClient.tsx
+++ b/src/admin/config/AdminAppConfigurationClient.tsx
@ -30,6 +30,8 @@ import {
  ConfigSectionKey,
  getAdminConfigSections,
 } from '.';
+import ColorDot from '@/photo/color/ColorDot';
+import { Oklch } from '@/photo/color/client';

 export default function AdminAppConfigurationClient({
  // Storage
@ -85,9 +87,13 @@ export default function AdminAppConfigurationClient({
  // Sort
  hasDefaultSortBy,
  defaultSortBy,
-  isSortWithPriority,
  hasNavSortControl,
  navSortControl,
+  isColorSortEnabled,
+  hasColorSortConfiguration,
+  colorSortStartingHue,
+  colorSortChromaCutoff,
+  isSortWithPriority,
  // Display
  showKeyboardShortcutTooltips,
  showExifInfo,
@ -201,6 +207,13 @@ export default function AdminAppConfigurationClient({
      {children || href}
    </Link>;

+  const renderColorDot = (color: Oklch | string, includeTooltip?: boolean) =>
+    <ColorDot
+      color={color}
+      className="size-3! ml-1"
+      includeTooltip={includeTooltip}
+    />;
+
  const renderGroupContent = (key: ConfigSectionKey): JSX.Element => {
    switch (key) {
    case 'Storage':
@ -406,7 +419,7 @@ export default function AdminAppConfigurationClient({
          </ChecklistRow>
        </>}
      </>;
-    case 'AI Text Generation':
+    case 'AI Content Generation':
      return <>
        <ChecklistRow
          title={isAiTextGenerationEnabled && isAnalyzingConfiguration
@ -426,7 +439,7 @@ export default function AdminAppConfigurationClient({
          {renderEnvVars(['OPENAI_SECRET_KEY'])}
        </ChecklistRow>
        <ChecklistRow
-          title={'Auto-generated fields'}
+          title={'Auto-generated text fields'}
          status={hasAiTextAutoGeneratedFields}
          optional
        >
@ -611,19 +624,70 @@ export default function AdminAppConfigurationClient({
          optional
        >
          <div>
-            {SORT_BY_OPTIONS.map(({sortBy, string }) =>
-              <Fragment key={ sortBy }>
-                {renderSubStatus(
-                  sortBy === defaultSortBy ? 'checked' : 'optional',
-                  `${string}${sortBy === APP_DEFAULT_SORT_BY
-                    ? ' (default)'
-                    : ''}`,
-                )}
-              </Fragment>)}
+            {SORT_BY_OPTIONS
+              .filter(({ canBeDefault }) => canBeDefault)
+              .map(({sortBy, string }) =>
+                <Fragment key={ sortBy }>
+                  {renderSubStatus(
+                    sortBy === defaultSortBy ? 'checked' : 'optional',
+                    `${string}${sortBy === APP_DEFAULT_SORT_BY
+                      ? ' (default)'
+                      : ''}`,
+                  )}
+                </Fragment>)}
          </div>
          Change default sort on grid/full homepages
          {renderEnvVars(['NEXT_PUBLIC_DEFAULT_SORT'])}
        </ChecklistRow>
+        <ChecklistRow
+          title={`Nav sort control: ${navSortControl}`}
+          status={hasNavSortControl}
+          optional
+        >
+          Set environment variable to {'"none"'}, {'"toggle"'} (default),
+          or {'"menu"'}, to control sort UI on grid/full homepages:
+          {renderEnvVars(['NEXT_PUBLIC_NAV_SORT_CONTROL'])}
+        </ChecklistRow>
+        <ChecklistRow
+          title="Color sort"
+          status={isColorSortEnabled}
+          experimental
+          optional
+        >
+          Set environment variable to {'"1"'} to enable color-based sorting
+          (forces nav sort control to {'"menu,"'} flags photos missing
+          color data in admin dashboard)—color identification
+          benefits greatly from AI being enabled:
+          {renderEnvVars([
+            'NEXT_PUBLIC_COLOR_SORT',
+          ])}
+        </ChecklistRow>
+        <ChecklistRow
+          title="Color sort configuration"
+          status={hasColorSortConfiguration}
+          experimental
+          optional
+        >
+          Configure which colors start first
+          (accepts a hue of 0 to 360, default: 80)
+          and which are considered sufficiently vibrant
+          (accepts a chroma of 0 to 0.37, default: 0.05):
+          <div>
+            <EnvVar
+              variable="NEXT_PUBLIC_COLOR_SORT_STARTING_HUE"
+              value={colorSortStartingHue}
+              accessory={renderColorDot({
+                l: 0.85,
+                c: 0.15,
+                h: colorSortStartingHue,
+              }, false)}
+            />
+            <EnvVar
+              variable="NEXT_PUBLIC_COLOR_SORT_CHROMA_CUTOFF"
+              value={colorSortChromaCutoff}
+            />
+          </div>
+        </ChecklistRow>
        <ChecklistRow
          title="Priority-based"
          status={isSortWithPriority}
@ -634,15 +698,6 @@ export default function AdminAppConfigurationClient({
          performance consequences):
          {renderEnvVars(['NEXT_PUBLIC_PRIORITY_BASED_SORTING'])}
        </ChecklistRow>
-        <ChecklistRow
-          title={`Nav sort control: ${navSortControl}`}
-          status={hasNavSortControl}
-          optional
-        >
-          Set environment variable to {'"none"'}, {'"toggle"'} (default),
-          or {'"menu"'}, to control sort UI on grid/full homepages:
-          {renderEnvVars(['NEXT_PUBLIC_NAV_SORT_CONTROL'])}
-        </ChecklistRow>
      </>;
    case 'Display':
      return <>
@ -768,17 +823,11 @@ export default function AdminAppConfigurationClient({
          <div className="pt-1 flex flex-col gap-1">
            <EnvVar
              variable="NEXT_PUBLIC_MATTE_COLOR"
-              accessory={matteColor && <span
-                className="size-[15px] border-medium rounded-sm ml-1"
-                style={{ backgroundColor: matteColor }}
-              />}
+              accessory={matteColor && renderColorDot(matteColor)}
            />
            <EnvVar
              variable="NEXT_PUBLIC_MATTE_COLOR_DARK"
-              accessory={matteColorDark && <span
-                className="size-[15px] border-medium rounded-sm ml-1"
-                style={{ backgroundColor: matteColorDark }}
-              />}
+              accessory={matteColorDark && renderColorDot(matteColorDark)}
            />
          </div>
        </ChecklistRow>
--- a/src/admin/config/index.tsx
+++ b/src/admin/config/index.tsx
@ -27,7 +27,7 @@ const ADMIN_CONFIG_SECTIONS = [{
  required: true,
  icon: <BiPencil size={16} />,
 }, {
-  title: 'AI Text Generation',
+  title: 'AI Content Generation',
  titleShort: 'AI',
  required: false,
  icon: <HiSparkles size={14} />,
--- a/src/admin/confirm.ts
+++ b/src/admin/confirm.ts
@ -3,12 +3,17 @@ import { Photo } from '@/photo';
 export const syncPhotoConfirmText = (
  photo: Photo,
  hasAiTextGeneration: boolean,
+  onlySyncColorData?: boolean,
 ) => {
  const confirmText = ['Sync'];
  if (photo.title) { confirmText.push(`"${photo.title}"`); }
-  confirmText.push('data from original image file?');
-  if (hasAiTextGeneration) { confirmText.push(
-    'AI text will be generated for undefined fields.'); }
+  if (onlySyncColorData) {
+    confirmText.push('color data?');
+  } else {
+    confirmText.push('data from original image file?');
+    if (hasAiTextGeneration) { confirmText.push(
+      'AI text will be generated for undefined fields.'); }
+  }
  confirmText.push('This action cannot be undone.');
  return confirmText.join(' ');
 };
--- a/src/admin/insights/AdminAppInsights.tsx
+++ b/src/admin/insights/AdminAppInsights.tsx
@ -6,7 +6,7 @@ import {
  getUniqueLenses,
  getUniqueRecipes,
  getUniqueTags,
-  getPhotosInNeedOfSyncCount,
+  getPhotosInNeedOfUpdateCount,
 } from '@/photo/db/query';
 import AdminAppInsightsClient from './AdminAppInsightsClient';
 import { getAllInsights, getGitHubMetaForCurrentApp } from '.';
@ -27,7 +27,7 @@ export default async function AdminAppInsights() {
  ] = await Promise.all([
    getPhotosMeta({ hidden: 'include' }),
    getPhotosMeta({ hidden: 'only' }),
-    getPhotosInNeedOfSyncCount(),
+    getPhotosInNeedOfUpdateCount(),
    getPhotosMeta({ maximumAspectRatio: 0.9 }),
    getGitHubMetaForCurrentApp(),
    getUniqueCameras(),
--- a/src/admin/insights/index.ts
+++ b/src/admin/insights/index.ts
@ -11,7 +11,7 @@ import {
  IS_META_TITLE_CONFIGURED,
  HAS_STATIC_OPTIMIZATION,
  GRID_HOMEPAGE_ENABLED,
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
 } from '@/app/config';
 import { PhotoDateRange } from '@/photo';
 import { getGitHubMeta } from '@/platforms/github';
@ -132,7 +132,7 @@ export const getAllInsights = ({
 }) => ({
  ...getSignificantInsights({ codeMeta, photosCountNeedSync }),
  noFork: !codeMeta?.isForkedFromBase && !codeMeta?.isBaseRepo,
-  noAi: !AI_TEXT_GENERATION_ENABLED,
+  noAi: !AI_CONTENT_GENERATION_ENABLED,
  noConfiguredMeta:
    !IS_META_TITLE_CONFIGURED ||
    !IS_META_DESCRIPTION_CONFIGURED,
--- a/src/app/config.ts
+++ b/src/app/config.ts
@ -9,6 +9,7 @@ import {
  shortenUrl,
 } from '@/utility/url';
 import { getNavSortControlFromString, getSortByFromString } from '@/photo/sort';
+import { parseChromaCutoff, parseStartingHue } from '@/photo/color/sort';

 // HARD-CODED GLOBAL CONFIGURATION

@ -205,7 +206,7 @@ export const CURRENT_STORAGE: StorageType =
 // AI

 export const OPENAI_BASE_URL = process.env.OPENAI_BASE_URL;
-export const AI_TEXT_GENERATION_ENABLED =
+export const AI_CONTENT_GENERATION_ENABLED =
  Boolean(process.env.OPENAI_SECRET_KEY);
 export const AI_TEXT_AUTO_GENERATED_FIELDS = parseAiAutoGeneratedFieldsString(
  process.env.AI_TEXT_AUTO_GENERATED_FIELDS);
@ -280,8 +281,15 @@ export const USER_DEFAULT_SORT_OPTIONS = {
  sortBy: USER_DEFAULT_SORT_BY,
  sortWithPriority: USER_DEFAULT_SORT_WITH_PRIORITY,
 };
-export const NAV_SORT_CONTROL =
-  getNavSortControlFromString(process.env.NEXT_PUBLIC_NAV_SORT_CONTROL);
+export const COLOR_SORT_ENABLED =
+  process.env.NEXT_PUBLIC_COLOR_SORT === '1';
+export const COLOR_SORT_STARTING_HUE =
+  parseStartingHue(process.env.NEXT_PUBLIC_COLOR_SORT_STARTING_HUE);
+export const COLOR_SORT_CHROMA_CUTOFF =
+  parseChromaCutoff(process.env.NEXT_PUBLIC_COLOR_SORT_CHROMA_CUTOFF);
+export const NAV_SORT_CONTROL = COLOR_SORT_ENABLED
+  ? 'menu'
+  : getNavSortControlFromString(process.env.NEXT_PUBLIC_NAV_SORT_CONTROL);

 // DISPLAY

@ -392,7 +400,7 @@ export const APP_CONFIGURATION = {
  hasPageAbout: Boolean(process.env.NEXT_PUBLIC_SITE_ABOUT),
  // AI
  hasOpenaiBaseUrl: Boolean(OPENAI_BASE_URL),
-  isAiTextGenerationEnabled: AI_TEXT_GENERATION_ENABLED,
+  isAiTextGenerationEnabled: AI_CONTENT_GENERATION_ENABLED,
  aiTextAutoGeneratedFields: process.env.AI_TEXT_AUTO_GENERATED_FIELDS
    ? AI_TEXT_AUTO_GENERATED_FIELDS.length === 0
      ? ['none']
@ -421,9 +429,15 @@ export const APP_CONFIGURATION = {
  // Sort
  hasDefaultSortBy: Boolean(process.env.NEXT_PUBLIC_DEFAULT_SORT),
  defaultSortBy: USER_DEFAULT_SORT_BY,
-  isSortWithPriority: USER_DEFAULT_SORT_WITH_PRIORITY,
  hasNavSortControl: Boolean(process.env.NEXT_PUBLIC_NAV_SORT_CONTROL),
  navSortControl: NAV_SORT_CONTROL,
+  isColorSortEnabled: COLOR_SORT_ENABLED,
+  hasColorSortConfiguration:
+    Boolean(process.env.NEXT_PUBLIC_COLOR_SORT_STARTING_HUE) ||
+    Boolean(process.env.NEXT_PUBLIC_COLOR_SORT_CHROMA_CUTOFF),
+  colorSortStartingHue: COLOR_SORT_STARTING_HUE,
+  colorSortChromaCutoff: COLOR_SORT_CHROMA_CUTOFF,
+  isSortWithPriority: USER_DEFAULT_SORT_WITH_PRIORITY,
  // Display
  showKeyboardShortcutTooltips: SHOW_KEYBOARD_SHORTCUT_TOOLTIPS,
  showExifInfo: SHOW_EXIF_DATA,
--- a/src/app/path.ts
+++ b/src/app/path.ts
@ -26,8 +26,9 @@ export const PATH_FULL_INFERRED = GRID_HOMEPAGE_ENABLED
 // Sort
 export const PARAM_SORT_TYPE_TAKEN_AT     = 'taken-at';
 export const PARAM_SORT_TYPE_UPLOADED_AT  = 'uploaded-at';
-export const PARAM_SORT_ORDER_NEWEST      = 'newest-first';
-export const PARAM_SORT_ORDER_OLDEST      = 'oldest-first';
+export const PARAM_SORT_TYPE_COLOR        = 'color';
+export const PARAM_SORT_ORDER_DESCENDING  = 'descending';
+export const PARAM_SORT_ORDER_ASCENDING   = 'ascending';
 export const doesPathOfferSort = (pathname: string) =>
  pathname === PATH_ROOT ||
  pathname.startsWith(PATH_GRID) ||
--- a/src/camera/CameraHeader.tsx
+++ b/src/camera/CameraHeader.tsx
@ -3,7 +3,7 @@ import PhotoHeader from '@/photo/PhotoHeader';
 import { Camera, cameraFromPhoto } from '.';
 import PhotoCamera from './PhotoCamera';
 import { descriptionForCameraPhotos } from './meta';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { getAppText } from '@/i18n/state/server';

 export default async function CameraHeader({
@ -45,7 +45,7 @@ export default async function CameraHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/cmdk/CommandKClient.tsx
+++ b/src/cmdk/CommandKClient.tsx
@ -182,8 +182,8 @@ export default function CommandKClient({
  const {
    doesPathOfferSort,
    isSortedByDefault,
-    pathNewest,
-    pathOldest,
+    pathDescending,
+    pathAscending,
    pathTakenAt,
    pathUploadedAt,
    pathClearSort,
@ -526,11 +526,11 @@ export default function CommandKClient({

  const sortItems = [{
    label: appText.sort.newestFirst,
-    path: pathNewest,
+    path: pathDescending,
    annotation: renderCheck(!isAscending),
  }, {
    label: appText.sort.oldestFirst,
-    path: pathOldest,
+    path: pathAscending,
    annotation: renderCheck(isAscending),
  }, {
    label: appText.sort.byTakenAt,
--- a/src/components/EnvVar.tsx
+++ b/src/components/EnvVar.tsx
@ -12,7 +12,7 @@ export default function EnvVar({
  className,
 }: {
  variable: string,
-  value?: string,
+  value?: string | number,
  accessory?: ReactNode,
  includeCopyButton?: boolean,
  trailingContent?: ReactNode,
--- a/src/components/FieldsetWithStatus.tsx
+++ b/src/components/FieldsetWithStatus.tsx
@ -19,6 +19,7 @@ export default function FieldsetWithStatus({
  icon,
  note,
  noteShort,
+  noteComplex,
  tooltip,
  error,
  value,
@ -48,6 +49,7 @@ export default function FieldsetWithStatus({
  icon?: ReactNode
  note?: string
  noteShort?: string
+  noteComplex?: ReactNode
  tooltip?: string
  error?: string
  value: string
@ -157,6 +159,7 @@ export default function FieldsetWithStatus({
              >
                ({note})
              </ResponsiveText>}
+            {noteComplex}
            {isModified && !error &&
              <span className={clsx(
                'text-main font-medium text-[0.9rem]',
--- a/src/film/FilmHeader.tsx
+++ b/src/film/FilmHeader.tsx
@ -6,7 +6,7 @@ import PhotoHeader from '@/photo/PhotoHeader';
 import PhotoFilm from '@/film/PhotoFilm';
 import { getRecipePropsFromPhotos } from '@/recipe';
 import { useAppState } from '@/app/AppState';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { useAppText } from '@/i18n/state/client';

 export default function FilmHeader({
@ -57,7 +57,7 @@ export default function FilmHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/focal/FocalLengthHeader.tsx
+++ b/src/focal/FocalLengthHeader.tsx
@ -2,7 +2,7 @@ import { Photo, PhotoDateRange } from '@/photo';
 import { descriptionForFocalLengthPhotos } from '.';
 import PhotoHeader from '@/photo/PhotoHeader';
 import PhotoFocalLength from './PhotoFocalLength';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { getAppText } from '@/i18n/state/server';

 export default async function FocalLengthHeader({
@ -41,7 +41,7 @@ export default async function FocalLengthHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/i18n/locales/bd-bn.ts
+++ b/src/i18n/locales/bd-bn.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: 'সাজান',
    newest: 'নতুনতম',
    oldest: 'পুরাতনতম',
+    descending: 'অবরোহী',
+    ascending: 'আরোহী',
    newestFirst: 'নতুনতম প্রথমে',
    oldestFirst: 'পুরাতনতম প্রথমে',
    viewNewest: 'নতুনতম দেখুন',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: 'আপলোড হয়েছে',
    byUploadedAt: 'আপলোডের সময় অনুযায়ী',
    uploadedAtShort: 'আপলোড',
+    color: 'ক্রোমাটিক',
+    byColor: 'রঙ অনুযায়ী',
    clearSort: 'সাজানো মুছুন',
  },
  cmdk: {
--- a/src/i18n/locales/en-us.ts
+++ b/src/i18n/locales/en-us.ts
@ -56,6 +56,8 @@ export const TEXT = {
    sort: 'Sort',
    newest: 'Newest',
    oldest: 'Oldest',
+    descending: 'Descending',
+    ascending: 'Ascending',
    newestFirst: 'Newest first',
    oldestFirst: 'Oldest first',
    viewNewest: 'View newest',
@ -65,6 +67,8 @@ export const TEXT = {
    uploadedAt: 'Uploaded at',
    byUploadedAt: 'By uploaded at',
    uploadedAtShort: 'Uploaded',
+    color: 'Chromatic',
+    byColor: 'By color',
    clearSort: 'Clear sort',
  },
  cmdk: {
--- a/src/i18n/locales/id-id.ts
+++ b/src/i18n/locales/id-id.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: 'Urutkan',
    newest: 'Terbaru',
    oldest: 'Terlama',
+    descending: 'Menurun',
+    ascending: 'Menaik',
    newestFirst: 'Terbaru dulu',
    oldestFirst: 'Terlama dulu',
    viewNewest: 'Lihat terbaru',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: 'Diunggah pada',
    byUploadedAt: 'Berdasarkan waktu unggahan',
    uploadedAtShort: 'Diunggah',
+    color: 'Kromatik',
+    byColor: 'Berdasarkan warna',
    clearSort: 'Hapus pengurutan',
  },
  cmdk: {
--- a/src/i18n/locales/pt-br.ts
+++ b/src/i18n/locales/pt-br.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: 'Ordenar',
    newest: 'Mais recentes',
    oldest: 'Mais antigas',
+    descending: 'Decrescente',
+    ascending: 'Crescente',
    newestFirst: 'Mais recentes primeiro',
    oldestFirst: 'Mais antigas primeiro',
    viewNewest: 'Ver mais recentes',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: 'Enviado em',
    byUploadedAt: 'Por data de envio',
    uploadedAtShort: 'Enviado',
+    color: 'Cromático',
+    byColor: 'Por cor',
    clearSort: 'Limpar ordenação',
  },
  cmdk: {
--- a/src/i18n/locales/pt-pt.ts
+++ b/src/i18n/locales/pt-pt.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: 'Ordenar',
    newest: 'Mais recentes',
    oldest: 'Mais antigas',
+    descending: 'Decrescente',
+    ascending: 'Crescente',
    newestFirst: 'Mais recentes primeiro',
    oldestFirst: 'Mais antigas primeiro',
    viewNewest: 'Ver mais recentes',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: 'Enviado em',
    byUploadedAt: 'Por data de envio',
    uploadedAtShort: 'Enviado',
+    color: 'Cromático',
+    byColor: 'Por cor',
    clearSort: 'Limpar ordenação',
  },
  cmdk: {
--- a/src/i18n/locales/tr-tr.ts
+++ b/src/i18n/locales/tr-tr.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: 'Sırala',
    newest: 'En Yeni',
    oldest: 'En Eski',
+    descending: 'Azalan',
+    ascending: 'Artan',
    newestFirst: 'En Yeniden Eskiye',
    oldestFirst: 'En Eskiden Yeniye',
    viewNewest: 'En yeniye bak',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: 'Yüklenme Zamanı',
    byUploadedAt: 'Yüklenme zamanına göre',
    uploadedAtShort: 'Yüklenme',
+    color: 'Kromatik',
+    byColor: 'Renge göre',
    clearSort: 'Sıralamayı temizle',
  },
  cmdk: {
--- a/src/i18n/locales/zh-cn.ts
+++ b/src/i18n/locales/zh-cn.ts
@ -57,6 +57,8 @@ export const TEXT: I18N = {
    sort: '排序',
    newest: '最新',
    oldest: '最旧',
+    descending: '降序',
+    ascending: '升序',
    newestFirst: '最新优先',
    oldestFirst: '最旧优先',
    viewNewest: '查看最新',
@ -66,6 +68,8 @@ export const TEXT: I18N = {
    uploadedAt: '上传时间',
    byUploadedAt: '按上传时间',
    uploadedAtShort: '上传',
+    color: '色度',
+    byColor: '按颜色',
    clearSort: '清除排序',
  },
  cmdk: {
--- a/src/lens/LensHeader.tsx
+++ b/src/lens/LensHeader.tsx
@ -3,7 +3,7 @@ import PhotoHeader from '@/photo/PhotoHeader';
 import { Lens, lensFromPhoto } from '.';
 import PhotoLens from './PhotoLens';
 import { descriptionForLensPhotos } from './meta';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { getAppText } from '@/i18n/state/server';

 export default async function LensHeader({
@ -46,7 +46,7 @@ export default async function LensHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/lens/index.ts
+++ b/src/lens/index.ts
@ -114,7 +114,7 @@ export const formatLensText = (

  switch (length) {
  case 'long':
-    return make ? `${make} ${model}` : modelRaw;
+    return make ? `${make} ${modelRaw}` : modelRaw;
  case 'medium':
  case 'short':
    return model;
--- a/src/photo/PhotoDetailPage.tsx
+++ b/src/photo/PhotoDetailPage.tsx
@ -14,7 +14,7 @@ import PhotoHeader from './PhotoHeader';
 import RecipeHeader from '@/recipe/RecipeHeader';
 import { ReactNode } from 'react';
 import LensHeader from '@/lens/LensHeader';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import YearHeader from '@/years/YearHeader';
 import RecentsHeader from '@/recents/RecentsHeader';

@ -135,7 +135,7 @@ export default function PhotoDetailPage({
          selectedPhoto={photo}
          photos={photos}
          recipe={recipe}
-          hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+          hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
        />}
      />
      <AnimateItems
--- a/src/photo/PhotoMedium.tsx
+++ b/src/photo/PhotoMedium.tsx
@ -14,6 +14,7 @@ import { useRef } from 'react';
 import useVisible from '@/utility/useVisible';
 import LinkWithStatus from '@/components/LinkWithStatus';
 import Spinner from '@/components/Spinner';
+import PhotoColors from './color/PhotoColors';

 export default function PhotoMedium({
  photo,
@ -22,6 +23,7 @@ export default function PhotoMedium({
  prefetch = SHOULD_PREFETCH_ALL_LINKS,
  className,
  onVisible,
+  debugColor = true,
  ...categories
 }: {
  photo: Photo
@ -30,6 +32,7 @@ export default function PhotoMedium({
  prefetch?: boolean
  className?: string
  onVisible?: () => void
+  debugColor?: boolean
 } & PhotoSetCategory) {
  const ref = useRef<HTMLAnchorElement>(null);

@ -40,6 +43,7 @@ export default function PhotoMedium({
      ref={ref}
      href={pathForPhoto({ photo, ...categories })}
      className={clsx(
+        'group',
        'active:brightness-75',
        selected && 'brightness-50',
        className,
@ -57,6 +61,16 @@ export default function PhotoMedium({
            )}>
              <Spinner size={20} color="text" />
            </div>}
+          {debugColor && photo.colorData &&
+            <div className={clsx(
+              'absolute inset-2 z-10',
+              'opacity-0 group-hover:opacity-100 transition-opacity',
+            )}>
+              <PhotoColors
+                className="justify-end"
+                colorData={photo.colorData}
+              />
+            </div>}
          <ImageMedium
            src={photo.url}
            aspectRatio={photo.aspectRatio}
--- a/src/photo/actions.ts
+++ b/src/photo/actions.ts
@ -13,6 +13,8 @@ import {
  deletePhotoRecipeGlobally,
  renamePhotoRecipeGlobally,
  getPhotosNeedingRecipeTitleCount,
+  updateColorDataForPhoto,
+  getColorDataForPhotos,
 } from '@/photo/db/query';
 import { PhotoQueryOptions, areOptionsSensitive } from './db';
 import {
@ -51,7 +53,7 @@ import { AiImageQuery, getAiImageQuery } from './ai';
 import { streamOpenAiImageQuery } from '@/platforms/openai';
 import {
  AI_TEXT_AUTO_GENERATED_FIELDS,
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
  BLUR_ENABLED,
 } from '@/app/config';
 import { generateAiImageQueries } from './ai/server';
@ -60,6 +62,10 @@ import { convertUploadToPhoto } from './storage';
 import { UrlAddStatus } from '@/admin/AdminUploadsClient';
 import { convertStringToArray } from '@/utility/string';
 import { after } from 'next/server';
+import {
+  getColorFieldsForImageUrl,
+  getColorFieldsForPhotoDbInsert,
+} from '@/photo/color/server';

 // Private actions

@ -124,11 +130,11 @@ const addUpload = async ({
  } = await extractImageDataFromBlobPath(url, {
    includeInitialPhotoFields: true,
    generateBlurData: BLUR_ENABLED,
-    generateResizedImage: AI_TEXT_GENERATION_ENABLED,
+    generateResizedImage: AI_CONTENT_GENERATION_ENABLED,
  });

  if (formDataFromExif) {
-    if (AI_TEXT_GENERATION_ENABLED) {
+    if (AI_CONTENT_GENERATION_ENABLED) {
      onStreamUpdate?.('Generating AI text');
    }

@ -207,7 +213,7 @@ export const addUploadsAction = async ({
  shouldRevalidateAllKeysAndPaths?: boolean
 }) =>
  runAuthenticatedAdminServerAction(async () => {
-    const PROGRESS_TASK_COUNT = AI_TEXT_GENERATION_ENABLED ? 5 : 4;
+    const PROGRESS_TASK_COUNT = AI_CONTENT_GENERATION_ENABLED ? 5 : 4;

    const addedUploadUrls: string[] = [];
    let currentUploadUrl = '';
@ -401,6 +407,39 @@ export const getPhotosNeedingRecipeTitleCountAction = async (
    ),
  );

+export const storeColorDataForPhotoAction = async (photoId: string) =>
+  runAuthenticatedAdminServerAction(async () => {
+    const photo = await getPhoto(photoId, true);
+    if (photo) {
+      const colorFields = await getColorFieldsForImageUrl(
+        photo.url,
+        photo.colorData,
+      );
+      if (colorFields) {
+        await updatePhoto(convertPhotoToPhotoDbInsert({
+          ...photo,
+          ...colorFields,
+        }));
+      }
+      revalidatePhoto(photo.id);
+    }
+  });
+
+export const recalculateColorDataForAllPhotosAction = async () =>
+  runAuthenticatedAdminServerAction(async () => {
+    const photos = await getColorDataForPhotos();
+    for (const { id, url, colorData: _colorData } of photos) {
+      const colorFields = await getColorFieldsForPhotoDbInsert(url, _colorData);
+      if (colorFields && colorFields.colorSort) {
+        await updateColorDataForPhoto(
+          id,
+          colorFields.colorData,
+          colorFields.colorSort,
+        );
+      }
+    }
+  });
+
 export const deletePhotoRecipeGloballyAction = async (formData: FormData) =>
  runAuthenticatedAdminServerAction(async () => {
    const recipe = formData.get('recipe') as string;
@ -463,7 +502,7 @@ export const syncPhotoAction = async (photoId: string, isBatch?: boolean) =>
      } = await extractImageDataFromBlobPath(photo.url, {
        includeInitialPhotoFields: false,
        generateBlurData: BLUR_ENABLED,
-        generateResizedImage: AI_TEXT_GENERATION_ENABLED,
+        generateResizedImage: AI_CONTENT_GENERATION_ENABLED,
      });

      let urlToDelete: string | undefined;
@ -490,7 +529,7 @@ export const syncPhotoAction = async (photoId: string, isBatch?: boolean) =>
          semanticDescription: aiSemanticDescription,
        } = await generateAiImageQueries(
          imageResizedBase64,
-          photo.syncStatus.missingAiTextFields,
+          photo.updateStatus.isMissingAiTextFields,
          undefined,
          isBatch,
        );
@ -526,10 +565,15 @@ export const syncPhotoAction = async (photoId: string, isBatch?: boolean) =>
    }
  });

-export const syncPhotosAction = async (photoIds: string[]) =>
+export const syncPhotosAction = async (photosToSync: {
+  photoId: string,
+  onlySyncColorData?: boolean,
+}[]) =>
  runAuthenticatedAdminServerAction(async () => {
-    for (const photoId of photoIds) {
-      await syncPhotoAction(photoId, true);
+    for (const { photoId, onlySyncColorData } of photosToSync) {
+      await (onlySyncColorData
+        ? storeColorDataForPhotoAction(photoId)
+        : syncPhotoAction(photoId, true));
    }
    revalidateAllKeysAndPaths();
  });
--- a/src/photo/color/ColorDot.tsx
+++ b/src/photo/color/ColorDot.tsx
@ -0,0 +1,49 @@
+import clsx from 'clsx/lite';
+import { convertOklchToCss, Oklch } from './client';
+import Tooltip from '@/components/Tooltip';
+
+const renderColor = (letter: string, value: number, shouldRound?: boolean) => (
+  <div className="flex gap-2">
+    <span className="text-dim">{letter}</span>
+    <span>{shouldRound ? Math.round(value) : value.toFixed(2)}</span>
+  </div>
+);
+
+export default function ColorDot({
+  color,
+  title,
+  className,
+  includeTooltip = true,
+}: {
+  color: Oklch | string
+  title?: string
+  className?: string
+  includeTooltip?: boolean
+}) {
+  const isColorHex = typeof color === 'string';
+  return (
+    <Tooltip content={includeTooltip && <>
+      {title &&
+        <div className="text-dim mb-1 text-left">
+          {title}
+        </div>}
+      {isColorHex
+        ? <div>{color}</div>
+        : <>
+          {renderColor('L', color.l)}
+          {renderColor('C', color.c)}
+          {renderColor('H', color.h, true)}
+        </>}
+    </>}>
+      <div
+        className={clsx(
+          'size-4 rounded-full outline outline-white/25',
+          className,
+        )}
+        style={{ backgroundColor: isColorHex
+          ? color 
+          : convertOklchToCss(color) }}
+      />
+    </Tooltip>
+  );
+}
--- a/src/photo/color/PhotoColors.tsx
+++ b/src/photo/color/PhotoColors.tsx
@ -0,0 +1,40 @@
+import clsx from 'clsx/lite';
+import ColorDot from './ColorDot';
+import { PhotoColorData } from './client';
+
+export default function PhotoColors({
+  className,
+  classNameDot,
+  colorData,
+}: {
+  className?: string
+  classNameDot?: string
+  colorData?: PhotoColorData
+}) {
+  return colorData
+    ? <div className={clsx(
+      'flex gap-1 flex-wrap justify-start',
+      className,
+    )}>
+      {colorData.ai &&
+        <ColorDot
+          title="AI"
+          className={classNameDot}
+          color={colorData.ai}
+        />}
+      <ColorDot
+        title="Average"
+        className={classNameDot}
+        color={colorData.average}
+      />
+      {colorData.colors.map((color, index) =>
+        <ColorDot
+          key={index}
+          title={`Color ${index + 1}`}
+          className={classNameDot}
+          color={color}
+        />,
+      )}
+    </div>
+    : null;
+}
--- a/src/photo/color/SyncColorButton.tsx
+++ b/src/photo/color/SyncColorButton.tsx
@ -0,0 +1,37 @@
+'use client';
+
+import LoaderButton from '@/components/primitives/LoaderButton';
+import { IoColorFilterOutline } from 'react-icons/io5';
+import {
+  recalculateColorDataForAllPhotosAction,
+  storeColorDataForPhotoAction,
+} from '../actions';
+import { useState } from 'react';
+
+export default function SyncColorButton({
+  photoId,
+}: {
+  photoId?: string
+}) {
+  const [isUpdatingColorData, setIsUpdatingColorData] = useState(false);
+
+  return (
+    <LoaderButton
+      icon={<IoColorFilterOutline size={20} />}
+      onClick={() => {
+        setIsUpdatingColorData(true);
+        (photoId
+          ? storeColorDataForPhotoAction(photoId)
+          : recalculateColorDataForAllPhotosAction())
+          .finally(() => setIsUpdatingColorData(false));
+      }}
+      tooltip={photoId
+        ? 'Update color data'
+        : 'Update color data for all photos'}
+      confirmText={!photoId
+        ? 'Are you sure you want to update all photo color data?'
+        : undefined}
+      isLoading={isUpdatingColorData}
+    />
+  );
+}
--- a/src/photo/color/client.ts
+++ b/src/photo/color/client.ts
@ -0,0 +1,43 @@
+export interface Oklch {
+  l: number
+  c: number
+  h: number
+}
+
+export interface PhotoColorData {
+  ai?: Oklch
+  average: Oklch
+  colors: Oklch[]
+}
+
+export const convertJsonStringToOklch = (jsonString = '') => {
+  const matches = jsonString
+    .match(/`*{ *l: *([0-9\.]+), *c: *([0-9\.]+), *h: *([0-9\.]+) *}`*/);
+  if (matches &&
+    matches[1] &&
+    matches[2] &&
+    matches[3]
+  ) {
+    return {
+      l: parseFloat(matches[1]),
+      c: parseFloat(matches[2]),
+      h: parseInt(matches[3]),
+    } as Oklch;
+  }
+};
+
+export const convertOklchToCss = (oklch: Oklch) =>
+  `oklch(${oklch.l} ${oklch.c} ${oklch.h})`;
+
+export const logOklch = (oklch: Oklch) =>
+  `L:${oklch.l.toFixed(2)} C:${oklch.c.toFixed(2)} H:${oklch.h.toFixed(2)}`;
+
+export const generateColorDataFromString = (colorData?: string) => {
+  if (colorData) {
+    try {
+      return JSON.parse(colorData) as PhotoColorData;
+    } catch (error) {
+      console.log('Error parsing color data', error);
+    }
+  }
+};
--- a/src/photo/color/server.ts
+++ b/src/photo/color/server.ts
@ -0,0 +1,134 @@
+import { convertRgbToOklab, parseHex } from 'culori';
+import { getNextImageUrlForManipulation } from '@/platforms/next-image';
+import {
+  AI_CONTENT_GENERATION_ENABLED,
+  IS_PREVIEW,
+} from '@/app/config';
+import { FastAverageColor } from 'fast-average-color';
+import { Oklch, PhotoColorData } from './client';
+import sharp from 'sharp';
+import { extractColors } from 'extract-colors';
+import { getImageBase64FromUrl } from '../server';
+import { generateOpenAiImageQuery } from '@/platforms/openai';
+import { calculateColorSort } from './sort';
+
+const NULL_RGB = { r: 0, g: 0, b: 0 };
+
+export const convertHexToOklch = (hex: string): Oklch => {
+  const rgb = parseHex(hex) ?? NULL_RGB;
+  const { a, b, l } = convertRgbToOklab(rgb);
+  const c = Math.sqrt(a * a + b * b);
+  const _h = Math.atan2(b, a) * (180 / Math.PI);
+  const h = _h < 0 ? _h + 360 : _h;
+  return {
+    l: +(l.toFixed(3)),
+    c: +(c.toFixed(3)),
+    h: +(h.toFixed(3)),
+  };
+};
+
+// Convert image url to byte array
+const getImageDataFromUrl = async (_url: string) => {
+  const url = getNextImageUrlForManipulation(_url, IS_PREVIEW);
+  const imageBuffer = await fetch(decodeURIComponent(url))
+    .then(res => res.arrayBuffer());
+  const image = sharp(imageBuffer);
+  const { width, height } = await image.metadata();
+  const buffer = await image.ensureAlpha().raw().toBuffer();
+  return {
+    data: new Uint8ClampedArray(buffer.buffer),
+    width,
+    height,
+  };
+};
+
+// algorithm library: fast-average-color
+const getAverageColorFromImageUrl = async (url: string) => {
+  const { data } = await getImageDataFromUrl(url);
+  const fac = new FastAverageColor();
+  const color = fac.prepareResult(fac.getColorFromArray4(data));
+  return convertHexToOklch(color.hex);
+};
+
+// algorithm library: extract-colors
+const getExtractedColorsFromImageUrl = async (url: string) => {
+  const data = await getImageDataFromUrl(url);
+  return extractColors(data).then(colors =>
+    colors.map(({ hex }) => convertHexToOklch(hex)));
+};
+
+const getColorDataFromImageUrl = async (
+  url: string,
+  isBatch?: boolean,
+): Promise<PhotoColorData> => {
+  const ai = AI_CONTENT_GENERATION_ENABLED 
+    ? await getColorFromAI(url, isBatch)
+    : undefined;
+  const average = await getAverageColorFromImageUrl(url);
+  const colors = await getExtractedColorsFromImageUrl(url);
+  return {
+    ...ai && { ai },
+    average,
+    colors,
+  };
+};
+
+export const getColorFieldsForImageUrl = async (
+  url: string,
+  _colorData?: PhotoColorData,
+  isBatch?: boolean,
+) => {
+  try {
+    const colorData = _colorData ??
+      await getColorDataFromImageUrl(url, isBatch);
+    return {
+      colorData,
+      colorSort: calculateColorSort(colorData),
+    };
+  } catch {
+    console.log('Error fetching image url data', url);
+  }
+};
+
+// Used when inserting colors into database
+export const getColorFieldsForPhotoDbInsert = async (
+  ...args: Parameters<typeof getColorFieldsForImageUrl>
+) => {
+  const { colorData, ...rest } = await getColorFieldsForImageUrl(...args) ?? {};
+  if (colorData) {
+    return {
+      colorData: JSON.stringify(colorData),
+      ...rest,
+    };
+  }
+};
+
+// Used when preparing colors for form
+export const getColorFieldsForPhotoForm = async (
+  ...args: Parameters<typeof getColorFieldsForImageUrl>
+) => {
+  const { colorSort, ...rest } =
+    await getColorFieldsForPhotoDbInsert(...args) ?? {};
+  return {
+    colorSort: `${colorSort}`,
+    ...rest,
+  };
+};
+
+export const getColorFromAI = async (
+  _url: string,
+  useBatch?: boolean,
+) => {
+  const url = getNextImageUrlForManipulation(_url, IS_PREVIEW);
+  const image = await getImageBase64FromUrl(url);
+  const hexColor = await generateOpenAiImageQuery(image, `
+    Does this image have a primary subject color?
+    If yes, what is the approximate hex color of the subject.
+    If not, what is the approximate hex color of the background?
+    Respond only with a hex color value:
+  `, useBatch);
+  const hex = hexColor?.match(/#*([a-f0-9]{6})/i)?.[1];
+  if (hex) {
+    return convertHexToOklch(`#${hex}`);
+  }
+};
--- a/src/photo/color/sort.ts
+++ b/src/photo/color/sort.ts
@ -0,0 +1,51 @@
+import {
+  COLOR_SORT_STARTING_HUE,
+  COLOR_SORT_CHROMA_CUTOFF,
+} from '@/app/config';
+import { PhotoColorData } from './client';
+
+// Start with yellow
+const DEFAULT_HUE_MAXIMA = 80;
+// Only sort sufficiently vibrant colors
+const DEFAULT_CHROMA_CUTOFF = 0.05;
+
+const SECTION_OFFSET_HUE = 200;
+const SECTION_OFFSET_LOW_CHROMA = 100;
+const SECTION_OFFSET_BLACK_AND_WHITE = 0;
+
+export const parseStartingHue = (hueMaxima = '') => {
+  const hueMaximaInt = parseInt(hueMaxima);
+  return isNaN(hueMaximaInt) ? DEFAULT_HUE_MAXIMA : hueMaximaInt;
+};
+
+export const parseChromaCutoff = (chromaCutoff = '') => {
+  const chromaCutoffFloat = parseFloat(chromaCutoff);
+  return isNaN(chromaCutoffFloat) ? DEFAULT_CHROMA_CUTOFF : chromaCutoffFloat;
+};
+
+export const calculateColorSort = (colorData: PhotoColorData) => {
+  // Prefer AI-generated colors when available
+  const colorPreferred = colorData.ai ?? colorData.average;
+
+  // Re-center hues based on start point
+  const hueNormalized = colorPreferred.h >= COLOR_SORT_STARTING_HUE
+    ? 360 - Math.abs(colorPreferred.h - COLOR_SORT_STARTING_HUE)
+    : Math.abs(colorPreferred.h - COLOR_SORT_STARTING_HUE);
+
+  // Analyze average chroma to determine if colors are sufficiently vibrant
+  const allColors = colorData.ai ? [colorData.ai] : [];
+  allColors.push(...colorData.colors, colorData.average);
+  const chromaAverage = allColors.reduce(
+    (acc, color) => acc + color.c, 0) / allColors.length;
+
+  const colorSort = colorPreferred.c >= COLOR_SORT_CHROMA_CUTOFF
+    // Organize by hue
+    ? hueNormalized + SECTION_OFFSET_HUE
+    : chromaAverage > 0
+      // Organize by lightness (with some chroma)
+      ? colorData.average.l * 100 + SECTION_OFFSET_LOW_CHROMA
+      // Organize by lightness (strictly black and white)
+      : colorData.average.l * 100 + SECTION_OFFSET_BLACK_AND_WHITE;
+
+  return Math.round(colorSort);
+};
--- a/src/photo/db/index.ts
+++ b/src/photo/db/index.ts
@ -178,6 +178,14 @@ export const getOrderByFromOptions = (options: PhotoQueryOptions) => {
    return sortWithPriority
      ? 'ORDER BY priority_order ASC, created_at ASC'
      : 'ORDER BY created_at ASC';
+  case 'hue':
+    return sortWithPriority
+      ? 'ORDER BY priority_order ASC, color_sort DESC'
+      : 'ORDER BY color_sort DESC';
+  case 'hueAsc':
+    return sortWithPriority
+      ? 'ORDER BY priority_order ASC, color_sort ASC'
+      : 'ORDER BY color_sort ASC';
  }
 };

--- a/src/photo/db/migration.ts
+++ b/src/photo/db/migration.ts
@ -78,6 +78,14 @@ export const MIGRATIONS: Migration[] = [{
    ALTER TABLE photos
    ADD COLUMN IF NOT EXISTS exclude_from_feeds BOOLEAN DEFAULT FALSE
  `,
+}, {
+  label: '07: Color Data',
+  fields: ['color_data', 'color_sort'],
+  run: () => sql`
+    ALTER TABLE photos
+    ADD COLUMN IF NOT EXISTS color_data JSONB,
+    ADD COLUMN IF NOT EXISTS color_sort SMALLINT
+  `,
 }];

 export const migrationForError = (e: any) =>
--- a/src/photo/db/query.ts
+++ b/src/photo/db/query.ts
@ -18,7 +18,8 @@ import { Films } from '@/film';
 import {
  ADMIN_SQL_DEBUG_ENABLED,
  AI_TEXT_AUTO_GENERATED_FIELDS,
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
+  COLOR_SORT_ENABLED,
 } from '@/app/config';
 import {
  PhotoQueryOptions,
@ -30,13 +31,14 @@ import { FocalLengths } from '@/focal';
 import { Lenses, createLensKey } from '@/lens';
 import { migrationForError } from './migration';
 import {
-  SYNC_QUERY_LIMIT,
+  UPDATE_QUERY_LIMIT,
  UPDATED_BEFORE_01,
  UPDATED_BEFORE_02,
-} from '../sync';
+} from '../update';
 import { MAKE_FUJIFILM } from '@/platforms/fujifilm';
 import { Recipes } from '@/recipe';
 import { Years } from '@/years';
+import { PhotoColorData } from '../color/client';

 const createPhotosTable = () =>
  sql`
@ -66,6 +68,8 @@ const createPhotosTable = () =>
      film VARCHAR(255),
      recipe_title VARCHAR(255),
      recipe_data JSONB,
+      color_data JSONB,
+      color_sort SMALLINT,
      priority_order REAL,
      taken_at TIMESTAMP WITH TIME ZONE NOT NULL,
      taken_at_naive VARCHAR(255) NOT NULL,
@ -193,6 +197,8 @@ export const insertPhoto = (photo: PhotoDbInsert) =>
      film,
      recipe_title,
      recipe_data,
+      color_data,
+      color_sort,
      priority_order,
      exclude_from_feeds,
      hidden,
@ -225,6 +231,8 @@ export const insertPhoto = (photo: PhotoDbInsert) =>
      ${photo.film},
      ${photo.recipeTitle},
      ${photo.recipeData},
+      ${photo.colorData},
+      ${photo.colorSort},
      ${photo.priorityOrder},
      ${photo.excludeFromFeeds},
      ${photo.hidden},
@ -260,6 +268,8 @@ export const updatePhoto = (photo: PhotoDbInsert) =>
    film=${photo.film},
    recipe_title=${photo.recipeTitle},
    recipe_data=${photo.recipeData},
+    color_data=${photo.colorData},
+    color_sort=${photo.colorSort},
    priority_order=${photo.priorityOrder || null},
    exclude_from_feeds=${photo.excludeFromFeeds},
    hidden=${photo.hidden},
@ -616,7 +626,7 @@ export const getPhoto = async (
      .then(photos => photos.length > 0 ? photos[0] : undefined);
  }, 'getPhoto');

-// Sync queries
+// Update queries

 const outdatedWhereClauses = [
  `updated_at < $1`,
@ -630,7 +640,7 @@ const outdatedWhereValues = [
 ];

 const needsAiTextWhereClauses =
-  AI_TEXT_GENERATION_ENABLED
+  AI_CONTENT_GENERATION_ENABLED
    ? AI_TEXT_AUTO_GENERATED_FIELDS
      .map(field => {
        switch (field) {
@ -642,29 +652,71 @@ const needsAiTextWhereClauses =
      })
    : [];

+const needsColorDataWhereClauses = COLOR_SORT_ENABLED
+  ? [`(
+    color_data IS NULL OR
+    color_sort IS NULL
+  )`]
+  : [];
+
 const needsSyncWhereStatement =
-  `WHERE ${outdatedWhereClauses.concat(needsAiTextWhereClauses).join(' OR ')}`;
+  `WHERE ${[
+    ...outdatedWhereClauses,
+    ...needsAiTextWhereClauses,
+    ...needsColorDataWhereClauses,
+  ].join(' OR ')}`;

-export const getPhotosInNeedOfSync = () => safelyQueryPhotos(
-  () => query(`
-    SELECT * FROM photos
-    ${needsSyncWhereStatement}
-    ORDER BY created_at DESC
-    LIMIT ${SYNC_QUERY_LIMIT}
-  `,
-  outdatedWhereValues,
-  )
-    .then(({ rows }) => rows.map(parsePhotoFromDb)),
-  'getPhotosInNeedOfSync',
-);
+export const getPhotosInNeedOfUpdate = () =>
+  safelyQueryPhotos(
+    () => query(`
+      SELECT * FROM photos
+      ${needsSyncWhereStatement}
+      ORDER BY created_at DESC
+      LIMIT ${UPDATE_QUERY_LIMIT}
+    `,
+    outdatedWhereValues,
+    )
+      .then(({ rows }) => rows.map(parsePhotoFromDb)),
+    'getPhotosInNeedOfUpdate',
+  );

-export const getPhotosInNeedOfSyncCount = () => safelyQueryPhotos(
-  () => query(`
-    SELECT COUNT(*) FROM photos
-    ${needsSyncWhereStatement}
-  `,
-  outdatedWhereValues,
-  )
-    .then(({ rows }) => parseInt(rows[0].count, 10)),
-  'getPhotosInNeedOfSyncCount',
-);
+export const getPhotosInNeedOfUpdateCount = () =>
+  safelyQueryPhotos(
+    () => query(`
+      SELECT COUNT(*) FROM photos
+      ${needsSyncWhereStatement}
+    `,
+    outdatedWhereValues,
+    )
+      .then(({ rows }) => parseInt(rows[0].count, 10)),
+    'getPhotosInNeedOfUpdateCount',
+  );
+
+// Backfills and experimentation
+
+export const getColorDataForPhotos = () =>
+  safelyQueryPhotos(() => sql<{
+    id: string,
+    url: string,
+    color_data?: PhotoColorData,
+  }>`
+    SELECT id, url, color_data FROM photos
+    LIMIT ${UPDATE_QUERY_LIMIT}
+  `.then(({ rows }) => rows.map(({ id, url, color_data }) =>
+    ({ id, url, colorData: color_data })))
+  , 'getColorDataForPhotos');
+
+export const updateColorDataForPhoto = (
+  photoId: string,
+  colorData: string,
+  colorSort: number,
+) =>
+  safelyQueryPhotos(
+    () => sql`
+      UPDATE photos SET
+      color_data=${colorData},
+      color_sort=${colorSort}
+      WHERE id=${photoId}
+    `,
+    'updateColorDataForPhoto',
+  );
--- a/src/photo/form/PhotoForm.tsx
+++ b/src/photo/form/PhotoForm.tsx
@ -49,6 +49,8 @@ import { useAppText } from '@/i18n/state/client';
 import IconAddUpload from '@/components/icons/IconAddUpload';
 import { didVisibilityChange } from '../visibility';
 import FieldsetVisibility from '../visibility/FieldsetVisibility';
+import PhotoColors from '../color/PhotoColors';
+import { generateColorDataFromString } from '../color/client';

 const THUMBNAIL_SIZE = 300;

@ -117,8 +119,12 @@ export default function PhotoForm({
            let a = currentForm[key];
            let b = value;
            if (FIELDS_WITH_JSON.includes(key)) {
-              a = a ? JSON.parse(a) : undefined;
-              b = b ? JSON.parse(b) : undefined;
+              try {
+                a = a ? JSON.parse(a) : undefined;
+                b = b ? JSON.parse(b) : undefined;
+              } catch (error) {
+                console.log(`Error parsing JSON: ${key}`, error);
+              }
            }
            if (!deepEqual(a, b)) {
              changedKeys.push(key as keyof PhotoFormData);
@ -445,6 +451,17 @@ export default function PhotoForm({
                    film={formData.film}
                    onMatchResults={onMatchResults}
                  />;
+                case 'colorData':
+                  return <FieldsetWithStatus
+                    key={key}
+                    {...fieldProps}
+                    noteComplex={<PhotoColors
+                      className="translate-y-[1.5px]"
+                      classNameDot="size-[13px]!"
+                      // eslint-disable-next-line max-len
+                      colorData={generateColorDataFromString(formData.colorData)}
+                    />}
+                  />;
                case 'visibility':
                  return <FieldsetVisibility
                    key={key}
--- a/src/photo/form/index.ts
+++ b/src/photo/form/index.ts
@ -14,6 +14,7 @@ import { FujifilmRecipe } from '@/platforms/fujifilm/recipe';
 import { ReactNode } from 'react';
 import { FujifilmSimulation } from '@/platforms/fujifilm/simulation';
 import { SelectMenuOptionType } from '@/components/SelectMenuOption';
+import { COLOR_SORT_ENABLED } from '@/app/config';

 type VirtualFields =
  'visibility' |
@ -182,6 +183,16 @@ const FORM_METADATA = (
    label: 'taken at (naive)',
    validate: validationMessageNaivePostgresDateString,
  },
+  colorData: {
+    type: 'textarea',
+    label: 'color data',
+    isJson: true,
+    shouldHide: () => !COLOR_SORT_ENABLED,
+  },
+  colorSort: {
+    label: 'color sort',
+    shouldHide: () => !COLOR_SORT_ENABLED,
+  },
  priorityOrder: { label: 'priority order' },
  excludeFromFeeds: { label: 'exclude from feeds', type: 'hidden' },
  hidden: { label: 'hidden', type: 'hidden' },
@ -257,6 +268,8 @@ export const convertPhotoToFormData = (photo: Photo): PhotoFormData => {
      return value ? 'true' : 'false';
    case 'recipeData':
      return JSON.stringify(value);
+    case 'colorData':
+      return JSON.stringify(value);
    default:
      return value !== undefined && value !== null
        ? value.toString()
@ -343,6 +356,9 @@ export const convertFormDataToPhotoDbInsert = (
    exposureCompensation: photoForm.exposureCompensation
      ? parseFloat(photoForm.exposureCompensation)
      : undefined,
+    colorSort: photoForm.colorSort
+      ? parseInt(photoForm.colorSort)
+      : undefined,
    priorityOrder: photoForm.priorityOrder
      ? parseFloat(photoForm.priorityOrder)
      : undefined,
--- a/src/photo/index.ts
+++ b/src/photo/index.ts
@ -22,8 +22,9 @@ import { isBefore } from 'date-fns';
 import type { Metadata } from 'next';
 import { FujifilmRecipe } from '@/platforms/fujifilm/recipe';
 import { FujifilmSimulation } from '@/platforms/fujifilm/simulation';
-import { PhotoSyncStatus, generatePhotoSyncStatus } from './sync';
+import { PhotoUpdateStatus, generatePhotoUpdateStatus } from './update';
 import { AppTextState } from '@/i18n/state';
+import { PhotoColorData } from './color/client';

 // INFINITE SCROLL: FULL
 export const INFINITE_SCROLL_FULL_INITIAL =
@ -83,6 +84,8 @@ export interface PhotoDbInsert extends PhotoExif {
  tags?: string[]
  recipeTitle?: string
  locationName?: string
+  colorData?: string
+  colorSort?: number
  priorityOrder?: number
  excludeFromFeeds?: boolean
  hidden?: boolean
@ -100,7 +103,7 @@ export interface PhotoDb extends
 }

 // Parsed db response
-export interface Photo extends Omit<PhotoDb, 'recipeData'> {
+export interface Photo extends Omit<PhotoDb, 'recipeData' | 'colorData'> {
  focalLengthFormatted?: string
  focalLengthIn35MmFormatFormatted?: string
  fNumberFormatted?: string
@ -110,7 +113,8 @@ export interface Photo extends Omit<PhotoDb, 'recipeData'> {
  takenAtNaiveFormatted: string
  tags: string[]
  recipeData?: FujifilmRecipe
-  syncStatus: PhotoSyncStatus
+  colorData?: PhotoColorData
+  updateStatus: PhotoUpdateStatus
 }

 export const parsePhotoFromDb = (photoDbRaw: PhotoDb): Photo => {
@ -144,7 +148,10 @@ export const parsePhotoFromDb = (photoDbRaw: PhotoDb): Photo => {
        ? JSON.parse(photoDb.recipeData)
        : photoDb.recipeData
      : undefined,
-    syncStatus: generatePhotoSyncStatus(photoDb),
+    colorData: photoDb.colorData
+      ? photoDb.colorData
+      : undefined,
+    updateStatus: generatePhotoUpdateStatus(photoDb),
  } as Photo;
 };

@ -164,15 +171,9 @@ export const convertPhotoToPhotoDbInsert = (
  ...photo,
  takenAt: photo.takenAt.toISOString(),
  recipeData: JSON.stringify(photo.recipeData),
+  colorData: JSON.stringify(photo.colorData),
 });

-export const photoStatsAsString = (photo: Photo) => [
-  photo.model,
-  photo.focalLengthFormatted,
-  photo.fNumberFormatted,
-  photo.isoFormatted,
-].join(' ');
-
 export const descriptionForPhoto = (
  photo: Photo,
  includeSemanticDescription?: boolean,
--- a/src/photo/server.ts
+++ b/src/photo/server.ts
@ -25,17 +25,18 @@ import {
 } from './db/query';
 import { PhotoDbInsert } from '.';
 import { convertExifToFormData } from './form/server';
+import { getColorFieldsForPhotoForm } from './color/server';

 const IMAGE_WIDTH_RESIZE = 200;
 const IMAGE_WIDTH_BLUR = 200;

 export const extractImageDataFromBlobPath = async (
  blobPath: string,
-  options?: {
+  options: {
    includeInitialPhotoFields?: boolean
    generateBlurData?: boolean
    generateResizedImage?: boolean
-  },
+  } = {},
 ): Promise<{
  blobId?: string
  formDataFromExif?: Partial<PhotoFormData>
@ -48,7 +49,7 @@ export const extractImageDataFromBlobPath = async (
    includeInitialPhotoFields,
    generateBlurData,
    generateResizedImage,
-  } = options ?? {};
+  } = options;

  const url = decodeURIComponent(blobPath);

@ -112,6 +113,8 @@ export const extractImageDataFromBlobPath = async (

  if (error) { console.log(error); }

+  const colorFields = await getColorFieldsForPhotoForm(url);
+
  return {
    blobId,
    ...exifData && {
@ -123,7 +126,8 @@ export const extractImageDataFromBlobPath = async (
          url,
        },
        ...generateBlurData && { blurData },
-        ...convertExifToFormData (exifData, film, recipe),
+        ...convertExifToFormData(exifData, film, recipe),
+        ...colorFields,
      },
    },
    imageResizedBase64,
@ -135,17 +139,20 @@ export const extractImageDataFromBlobPath = async (

 const generateBase64 = async (
  image: ArrayBuffer,
-  middleware: (sharp: Sharp) => Sharp,
+  middleware?: (sharp: Sharp) => Sharp,
 ) => 
-  middleware(sharp(image))
+  (middleware ? middleware(sharp(image)) : sharp(image))
    .withMetadata()
    .toFormat('jpeg', { quality: 90 })
    .toBuffer()
    .then(data => `data:image/jpeg;base64,${data.toString('base64')}`);

-const resizeImage = async (image: ArrayBuffer) => 
+const resizeImage = async (
+  image: ArrayBuffer,
+  width = IMAGE_WIDTH_RESIZE,
+) => 
  generateBase64(image, sharp => sharp
-    .resize(IMAGE_WIDTH_RESIZE),
+    .resize(width),
  );

 const blurImage = async (image: ArrayBuffer) => 
@ -155,10 +162,22 @@ const blurImage = async (image: ArrayBuffer) =>
    .blur(4),
  );

-export const resizeImageFromUrl = async (url: string) => 
+export const getImageBase64FromUrl = async (url: string) => 
  fetch(decodeURIComponent(url))
    .then(res => res.arrayBuffer())
-    .then(buffer => resizeImage(buffer))
+    .then(buffer => generateBase64(buffer))
+    .catch(e => {
+      console.log(`Error getting image base64 from URL (${url})`, e);
+      return '';
+    });
+
+export const resizeImageFromUrl = async (
+  url: string,
+  width?: number,
+) => 
+  fetch(decodeURIComponent(url))
+    .then(res => res.arrayBuffer())
+    .then(buffer => resizeImage(buffer, width))
    .catch(e => {
      console.log(`Error resizing image from URL (${url})`, e);
      return '';
@ -210,6 +229,7 @@ export const convertFormDataToPhotoDbInsertAndLookupRecipeTitle =
        photo.recipeData,
        photo.film,
      );
+      // Only replace recipe title when a new one is found
      if (recipeTitle) {
        photo.recipeTitle = recipeTitle;
      }
--- a/src/photo/sort/SortMenu.tsx
+++ b/src/photo/sort/SortMenu.tsx
@ -4,6 +4,7 @@ import { getSortStateFromPath } from './path';
 import IconCheck from '@/components/icons/IconCheck';
 import { clsx } from 'clsx/lite';
 import { useAppText } from '@/i18n/state/client';
+import { COLOR_SORT_ENABLED } from '@/app/config';

 export default function SortMenu({
  isOpen,
@ -11,10 +12,12 @@ export default function SortMenu({
  isAscending,
  isTakenAt,
  isUploadedAt,
-  pathNewest,
-  pathOldest,
+  isColor,
+  pathDescending,
+  pathAscending,
  pathTakenAt,
  pathUploadedAt,
+  pathColor,
 }: {
  isOpen?: boolean
  setIsOpen?: (isOpen: boolean) => void
@ -32,6 +35,40 @@ export default function SortMenu({
    </span>,
  });
  
+  const itemsSortOrder = [{
+    ...renderLabel(
+      isColor ? appText.sort.descending : appText.sort.newest,
+      !isAscending,
+    ),
+    icon: renderIcon(!isAscending),
+    href: pathDescending,
+  }, {
+    ...renderLabel(
+      isColor ? appText.sort.ascending : appText.sort.oldest,
+      isAscending,
+    ),
+    icon: renderIcon(isAscending),
+    href: pathAscending,
+  }];
+
+  const itemsSortType = [{
+    ...renderLabel(appText.sort.takenAt, isTakenAt),
+    icon: renderIcon(isTakenAt),
+    href: pathTakenAt,
+  }, {
+    ...renderLabel(appText.sort.uploadedAtShort, isUploadedAt),
+    icon: renderIcon(isUploadedAt),
+    href: pathUploadedAt,
+  }];
+
+  if (COLOR_SORT_ENABLED) {
+    itemsSortType.push({
+      ...renderLabel(appText.sort.color, isColor),
+      icon: renderIcon(isColor),
+      href: pathColor,
+    });
+  }
+
  return (
    <SwitcherItemMenu
      {...{ isOpen, setIsOpen }}
@ -40,25 +77,9 @@ export default function SortMenu({
        className="shrink-0 translate-x-[0.5px] translate-y-[1px]"
      />}
      sections={[{
-        items: [{
-          ...renderLabel(appText.sort.newest, !isAscending),
-          icon: renderIcon(!isAscending),
-          href: pathNewest,
-        }, {
-          ...renderLabel(appText.sort.oldest, isAscending),
-          icon: renderIcon(isAscending),
-          href: pathOldest,
-        }],
+        items: itemsSortOrder,
      }, {
-        items: [{
-          ...renderLabel(appText.sort.takenAt, isTakenAt),
-          icon: renderIcon(isTakenAt),
-          href: pathTakenAt,
-        }, {
-          ...renderLabel(appText.sort.uploadedAtShort, isUploadedAt),
-          icon: renderIcon(isUploadedAt),
-          href: pathUploadedAt,
-        }],
+        items: itemsSortType,
      }]}
      align="start"
      side="top"
--- a/src/photo/sort/index.ts
+++ b/src/photo/sort/index.ts
@ -16,19 +16,27 @@ export const getNavSortControlFromString = (
 export const SORT_BY_OPTIONS = [{
  sortBy: 'takenAt',
  string: 'taken-at',
-  label: 'Taken At (Newest First)',
+  canBeDefault: true,
 }, {
  sortBy: 'takenAtAsc',
  string: 'taken-at-oldest-first',
-  label: 'Taken At (Oldest First)',
+  canBeDefault: true,
 }, {
  sortBy: 'createdAt',
  string: 'uploaded-at',
-  label: 'Uploaded At (Newest First)',
+  canBeDefault: true,
 }, {
  sortBy: 'createdAtAsc',
  string: 'uploaded-at-oldest-first',
-  label: 'Uploaded At (Oldest First)',
+  canBeDefault: true,
+}, {
+  sortBy: 'hue',
+  string: 'hue',
+  canBeDefault: false,
+}, {
+  sortBy: 'hueAsc',
+  string: 'hue-oldest-first',
+  canBeDefault: false,
 }] as const;

 export type SortBy = (typeof SORT_BY_OPTIONS)[number]['sortBy'];
@ -50,9 +58,13 @@ export const getSortByFromString = (sortBy = ''): SortBy => {
  case 'taken-at-oldest-first': return 'takenAtAsc';
  case 'uploaded-at': return 'createdAt';
  case 'uploaded-at-oldest-first': return 'createdAtAsc';
-  default:return 'takenAt';
+  case 'hue': return 'hue';
+  case 'hue-oldest-first': return 'hueAsc';
+  default: return 'takenAt';
  }
 };

 export const isSortAscending = (sortBy: SortBy) =>
-  sortBy === 'takenAtAsc' || sortBy === 'createdAtAsc';
+  sortBy === 'takenAtAsc' ||
+  sortBy === 'createdAtAsc' ||
+  sortBy === 'hueAsc';
--- a/src/photo/sort/path.ts
+++ b/src/photo/sort/path.ts
@ -3,8 +3,9 @@

 import {
  doesPathOfferSort as _doesPathOfferSort,
-  PARAM_SORT_ORDER_NEWEST,
-  PARAM_SORT_ORDER_OLDEST,
+  PARAM_SORT_ORDER_ASCENDING,
+  PARAM_SORT_ORDER_DESCENDING,
+  PARAM_SORT_TYPE_COLOR,
  PARAM_SORT_TYPE_TAKEN_AT,
  PARAM_SORT_TYPE_UPLOADED_AT,
  PATH_FULL_INFERRED,
@ -24,19 +25,27 @@ const getSortByComponents = (sortBy: SortBy): {
  switch (sortBy) {
  case 'takenAt': return {
    sortType: PARAM_SORT_TYPE_TAKEN_AT,
-    sortOrder: PARAM_SORT_ORDER_NEWEST,
+    sortOrder: PARAM_SORT_ORDER_DESCENDING,
  };
  case 'takenAtAsc': return {
    sortType: PARAM_SORT_TYPE_TAKEN_AT,
-    sortOrder: PARAM_SORT_ORDER_OLDEST,
+    sortOrder: PARAM_SORT_ORDER_ASCENDING,
  };
  case 'createdAt': return {
    sortType: PARAM_SORT_TYPE_UPLOADED_AT,
-    sortOrder: PARAM_SORT_ORDER_NEWEST,
+    sortOrder: PARAM_SORT_ORDER_DESCENDING,
  };
  case 'createdAtAsc': return {
    sortType: PARAM_SORT_TYPE_UPLOADED_AT,
-    sortOrder: PARAM_SORT_ORDER_OLDEST,
+    sortOrder: PARAM_SORT_ORDER_ASCENDING,
+  };
+  case 'hue': return {
+    sortType: PARAM_SORT_TYPE_COLOR,
+    sortOrder: PARAM_SORT_ORDER_DESCENDING,
+  };
+  case 'hueAsc': return {
+    sortType: PARAM_SORT_TYPE_COLOR,
+    sortOrder: PARAM_SORT_ORDER_ASCENDING,
  };
  }
 };
@ -54,7 +63,7 @@ const _getSortOptionsFromParams = (
  sortWithPriority: boolean
 } => {
  let sortBy: SortBy = 'takenAt';
-  const isAscending = sortOrder === PARAM_SORT_ORDER_OLDEST;
+  const isAscending = sortOrder === PARAM_SORT_ORDER_ASCENDING;
  switch (sortType) {
  case PARAM_SORT_TYPE_TAKEN_AT: {
    sortBy = isAscending
@ -68,6 +77,12 @@ const _getSortOptionsFromParams = (
      : 'createdAt';
    break;
  }
+  case PARAM_SORT_TYPE_COLOR: {
+    sortBy = isAscending
+      ? 'hueAsc'
+      : 'hue';
+    break;
+  }
  }
  return {
    sortBy,
@ -107,12 +122,13 @@ export const getSortStateFromPath = (pathname: string) => {
  } = getPathSortComponents(pathname);

  const isSortedByDefault = sortBy === USER_DEFAULT_SORT_BY;
-  const sortOrderReversed = sortOrder === PARAM_SORT_ORDER_OLDEST
-    ? PARAM_SORT_ORDER_NEWEST
-    : PARAM_SORT_ORDER_OLDEST;
-  const isAscending = sortOrder === PARAM_SORT_ORDER_OLDEST;
+  const sortOrderReversed = sortOrder === PARAM_SORT_ORDER_DESCENDING
+    ? PARAM_SORT_ORDER_ASCENDING
+    : PARAM_SORT_ORDER_DESCENDING;
+  const isAscending = sortOrder === PARAM_SORT_ORDER_ASCENDING;
  const isTakenAt = sortType === PARAM_SORT_TYPE_TAKEN_AT;
  const isUploadedAt = sortType === PARAM_SORT_TYPE_UPLOADED_AT;
+  const isColor = sortType === PARAM_SORT_TYPE_COLOR;

  const getPath = ({
    gridOrFull = _gridOrFull,
@ -147,14 +163,16 @@ export const getSortStateFromPath = (pathname: string) => {
    getPath({ sortType, sortOrder: sortOrderReversed });

  // Sort menu paths
-  const pathNewest =
-    getPath({ sortType, sortOrder: PARAM_SORT_ORDER_NEWEST });
-  const pathOldest =
-    getPath({ sortType, sortOrder: PARAM_SORT_ORDER_OLDEST });
+  const pathDescending =
+    getPath({ sortType, sortOrder: PARAM_SORT_ORDER_DESCENDING });
+  const pathAscending =
+    getPath({ sortType, sortOrder: PARAM_SORT_ORDER_ASCENDING });
  const pathTakenAt =
    getPath({ sortType: PARAM_SORT_TYPE_TAKEN_AT, sortOrder });
  const pathUploadedAt =
    getPath({ sortType: PARAM_SORT_TYPE_UPLOADED_AT, sortOrder });
+  const pathColor =
+    getPath({ sortType: PARAM_SORT_TYPE_COLOR, sortOrder });

  // Sort clear
  const pathClearSort = _gridOrFull === 'grid'
@ -168,12 +186,14 @@ export const getSortStateFromPath = (pathname: string) => {
    isAscending,
    isTakenAt,
    isUploadedAt,
+    isColor,
    pathGrid,
    pathFull,
-    pathNewest,
-    pathOldest,
+    pathDescending,
+    pathAscending,
    pathTakenAt,
    pathUploadedAt,
+    pathColor,
    pathClearSort,
    pathSortToggle,
  };
--- a/src/photo/sync.ts
+++ b/src/photo/sync.ts
@ -1,87 +0,0 @@
-import { MAKE_FUJIFILM } from '@/platforms/fujifilm';
-import { Photo, PhotoDb } from '.';
-import {
-  AI_TEXT_AUTO_GENERATED_FIELDS,
-  AI_TEXT_GENERATION_ENABLED,
-} from '@/app/config';
-import { AiAutoGeneratedField } from './ai';
-
-export interface PhotoSyncStatus {
-  isOutdated: boolean;
-  missingAiTextFields: AiAutoGeneratedField[];
-}
-
-export const SYNC_QUERY_LIMIT = 1000;
-
-export const UPDATED_BEFORE_01 = new Date('2024-06-16');
-// UTC 2025-02-24 05:30:00
-export const UPDATED_BEFORE_02 = new Date(Date.UTC(2025, 1, 24, 5, 30, 0));
-
-const isPhotoOutdated = (photo: PhotoDb) =>
-  photo.updatedAt < UPDATED_BEFORE_01 || (
-    photo.updatedAt < UPDATED_BEFORE_02 &&
-    photo.make === MAKE_FUJIFILM
-  );
-
-const getMissingAiTextFields = ({
-  title,
-  caption,
-  tags,
-  semanticDescription,
-}: PhotoDb | Photo): AiAutoGeneratedField[] =>
-  AI_TEXT_GENERATION_ENABLED
-    ? AI_TEXT_AUTO_GENERATED_FIELDS.reduce((fields, field) => {
-      switch (field) {
-      case 'title':
-        return !title ? [...fields, 'title'] : fields;
-      case 'caption':
-        return !caption ? [...fields, 'caption'] : fields;
-      case 'tags':
-        return (tags ?? []).length === 0 ? [...fields, 'tags'] : fields;
-      case 'semantic':
-        return !semanticDescription ? [...fields, 'semantic'] : fields;
-      }
-    }, [] as AiAutoGeneratedField[])
-    : [];
-
-export const generatePhotoSyncStatus = (photo: PhotoDb): PhotoSyncStatus => ({
-  isOutdated: isPhotoOutdated(photo),
-  missingAiTextFields: getMissingAiTextFields(photo),
-});
-
-export const photoNeedsToBeSynced = (photo: Photo) =>
-  photo.syncStatus.isOutdated ||
-  photo.syncStatus.missingAiTextFields.length > 0;
-
-export const getPhotoSyncStatusText = (photo: Photo) => {
-  const { isOutdated, missingAiTextFields } = photo.syncStatus;
-  const text: string[] = [];
-  if (isOutdated) {
-    text.push('Outdated Data');
-  } else if (missingAiTextFields.length > 0) {
-    const missingFieldsText = missingAiTextFields
-      .map(field => field.toLocaleUpperCase())
-      .join(', ');
-    text.push(`Missing AI Text (${missingFieldsText})`);
-  }
-  return text.join(' and ') + '—sync to update';
-};
-
-export const getPhotosSyncStatusText = (photos: Photo[]) => {
-  const statusText = [] as string[];
-
-  const photosCountOutdated = photos.filter(
-    photo => photo.syncStatus.isOutdated,
-  ).length;
-  const photosCountMissingAiText = photos.filter(
-    photo => photo.syncStatus.missingAiTextFields.length > 0,
-  ).length;
-  
-  if (photosCountOutdated > 0) {
-    statusText.push(`${photosCountOutdated} outdated`);
-  }
-  if (photosCountMissingAiText > 0) {
-    statusText.push(`${photosCountMissingAiText} missing AI text`);
-  }
-  return statusText.join(', ');
-};
--- a/src/photo/update/UpdateTooltip.tsx
+++ b/src/photo/update/UpdateTooltip.tsx
@ -0,0 +1,21 @@
+import clsx from 'clsx/lite';
+import { getPhotoUpdateStatusText } from '.';
+import Tooltip from '@/components/Tooltip';
+import { Photo } from '..';
+
+export default function UpdateTooltip({
+  photo,
+}: {
+  photo: Photo
+}) {
+  return (
+    <Tooltip
+      content={getPhotoUpdateStatusText(photo)}
+      classNameTrigger={clsx(
+        'text-blue-600 dark:text-blue-400',
+        'translate-y-[0.5px]',
+      )}
+      supportMobile
+    />
+  );
+}
--- a/src/photo/update/index.ts
+++ b/src/photo/update/index.ts
@ -0,0 +1,142 @@
+import { MAKE_FUJIFILM } from '@/platforms/fujifilm';
+import { Photo, PhotoDb } from '..';
+import {
+  AI_TEXT_AUTO_GENERATED_FIELDS,
+  AI_CONTENT_GENERATION_ENABLED,
+  COLOR_SORT_ENABLED,
+} from '@/app/config';
+import { AiAutoGeneratedField } from '../ai';
+import { capitalize } from '@/utility/string';
+
+export interface PhotoUpdateStatus {
+  isOutdated: boolean
+  isMissingAiTextFields: AiAutoGeneratedField[]
+  isMissingColorData: boolean
+}
+
+export const UPDATE_QUERY_LIMIT = 1000;
+
+export const UPDATED_BEFORE_01 = new Date('2024-06-16');
+// UTC 2025-02-24 05:30:00
+export const UPDATED_BEFORE_02 = new Date(Date.UTC(2025, 1, 24, 5, 30, 0));
+
+const isPhotoOutdated = (photo: PhotoDb) =>
+  photo.updatedAt < UPDATED_BEFORE_01 || (
+    photo.updatedAt < UPDATED_BEFORE_02 &&
+    photo.make === MAKE_FUJIFILM
+  );
+
+const getMissingAiTextFields = ({
+  title,
+  caption,
+  tags,
+  semanticDescription,
+}: PhotoDb | Photo): AiAutoGeneratedField[] =>
+  AI_CONTENT_GENERATION_ENABLED
+    ? AI_TEXT_AUTO_GENERATED_FIELDS.reduce((fields, field) => {
+      switch (field) {
+      case 'title':
+        return !title ? [...fields, 'title'] : fields;
+      case 'caption':
+        return !caption ? [...fields, 'caption'] : fields;
+      case 'tags':
+        return (tags ?? []).length === 0 ? [...fields, 'tags'] : fields;
+      case 'semantic':
+        return !semanticDescription ? [...fields, 'semantic'] : fields;
+      }
+    }, [] as AiAutoGeneratedField[])
+    : [];
+
+export const isPhotoMissingColorData = (photo: PhotoDb) =>
+  // "== null" intentional check for undefined or null
+  COLOR_SORT_ENABLED && (
+    photo.colorData == null ||
+    photo.colorSort == null
+  );
+
+export const generatePhotoUpdateStatus = (
+  photo: PhotoDb,
+): PhotoUpdateStatus => ({
+  isOutdated: isPhotoOutdated(photo),
+  isMissingAiTextFields: getMissingAiTextFields(photo),
+  isMissingColorData: isPhotoMissingColorData(photo),
+});
+
+export const photoNeedsToBeUpdated = (photo: Photo) =>
+  photo.updateStatus.isOutdated ||
+  photo.updateStatus.isMissingAiTextFields.length > 0 ||
+  photo.updateStatus.isMissingColorData;
+
+export const isPhotoOnlyMissingColorData = (photo?: Photo) =>
+  photo?.updateStatus.isMissingColorData &&
+  !photo?.updateStatus.isOutdated &&
+  (photo?.updateStatus.isMissingAiTextFields.length ?? 0) === 0;
+
+export const getPhotoUpdateStatusText = (photo: Photo) => {
+  const {
+    isOutdated,
+    isMissingAiTextFields,
+    isMissingColorData,
+  } = photo.updateStatus;
+
+  const cta = 'sync to update';
+  if (isOutdated) {
+    return `Outdated data—${cta}`;
+  } else {
+    const textParts: string[] = [];
+    if (isMissingAiTextFields.length > 0) {
+      const missingFields = isMissingAiTextFields
+        .map(field => field.toLocaleUpperCase())
+        .join(', ');
+      textParts.push(`AI text (${missingFields})`);
+    }
+    if (isMissingColorData) {
+      textParts.push('color data');
+    }
+    if (textParts.length > 0) {
+      return `Missing ${textParts.join(', ')}—${cta}`;
+    } else {
+      return capitalize(cta);
+    }
+  }
+};
+
+export const getPhotosUpdateStatusCounts = (photos: Photo[]) => {
+  const photosCountOutdated = photos.filter(
+    photo => photo.updateStatus.isOutdated,
+  ).length;
+  const photosCountMissingAiText = photos.filter(
+    photo => photo.updateStatus.isMissingAiTextFields.length > 0,
+  ).length;
+  const photosCountMissingColorData = photos.filter(
+    photo => photo.updateStatus.isMissingColorData,
+  ).length;
+
+  return {
+    photosCountOutdated,
+    photosCountMissingAiText,
+    photosCountMissingColorData,
+  };
+};
+
+export const getPhotosUpdateStatusText = (photos: Photo[]) => {
+  const statusText = [] as string[];
+
+  const {
+    photosCountOutdated,
+    photosCountMissingAiText,
+    photosCountMissingColorData,
+  } = getPhotosUpdateStatusCounts(photos);
+
+  if (photosCountOutdated > 0) {
+    statusText.push(`${photosCountOutdated} outdated`);
+  }
+  if (photosCountMissingAiText > 0) {
+    statusText.push(`${photosCountMissingAiText} missing AI text`);
+  }
+  if (photosCountMissingColorData > 0) {
+    statusText.push(`${photosCountMissingColorData} missing color data`);
+  }
+
+  return statusText.join(', ');
+};
--- a/src/platforms/openai.ts
+++ b/src/platforms/openai.ts
@ -4,7 +4,7 @@ import { createOpenAI } from '@ai-sdk/openai';
 import { Redis } from '@upstash/redis';
 import { Ratelimit } from '@upstash/ratelimit';
 import {
-  AI_TEXT_GENERATION_ENABLED,
+  AI_CONTENT_GENERATION_ENABLED,
  HAS_REDIS_STORAGE,
  OPENAI_BASE_URL,
 } from '@/app/config';
@ -16,7 +16,7 @@ const redis = HAS_REDIS_STORAGE ? Redis.fromEnv() : undefined;
 const RATE_LIMIT_IDENTIFIER = 'openai-image-query';
 const MODEL = 'gpt-4o';

-const openai = AI_TEXT_GENERATION_ENABLED
+const openai = AI_CONTENT_GENERATION_ENABLED
  ? createOpenAI({
    apiKey: process.env.OPENAI_SECRET_KEY,
    ...OPENAI_BASE_URL && { baseURL: OPENAI_BASE_URL },
--- a/src/recents/RecentsHeader.tsx
+++ b/src/recents/RecentsHeader.tsx
@ -2,7 +2,7 @@

 import { descriptionForPhotoSet, Photo, PhotoDateRange } from '@/photo';
 import PhotoHeader from '@/photo/PhotoHeader';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { useAppText } from '@/i18n/state/client';
 import PhotoRecents from './PhotoRecents';

@ -37,7 +37,7 @@ export default function RecentsHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/recipe/RecipeHeader.tsx
+++ b/src/recipe/RecipeHeader.tsx
@ -5,7 +5,7 @@ import PhotoHeader from '@/photo/PhotoHeader';
 import PhotoRecipe from './PhotoRecipe';
 import { useAppState } from '@/app/AppState';
 import { descriptionForRecipePhotos, getRecipePropsFromPhotos } from '.';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { useAppText } from '@/i18n/state/client';

 export default function RecipeHeader({
@ -53,7 +53,7 @@ export default function RecipeHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/tag/PrivateHeader.tsx
+++ b/src/tag/PrivateHeader.tsx
@ -1,7 +1,7 @@
 import { Photo, photoQuantityText } from '@/photo';
 import PhotoHeader from '@/photo/PhotoHeader';
 import PhotoPrivate from './PhotoPrivate';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { getAppText } from '@/i18n/state/server';

 export default async function PrivateHeader({
@ -25,7 +25,7 @@ export default async function PrivateHeader({
      selectedPhoto={selectedPhoto}
      indexNumber={indexNumber}
      count={count}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
    />
  );
 }
--- a/src/tag/TagHeader.tsx
+++ b/src/tag/TagHeader.tsx
@ -3,7 +3,7 @@ import PhotoTag from './PhotoTag';
 import { descriptionForTaggedPhotos, isTagFavs } from '.';
 import PhotoHeader from '@/photo/PhotoHeader';
 import PhotoFavs from './PhotoFavs';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import { getAppText } from '@/i18n/state/server';

 export default async function TagHeader({
@ -47,7 +47,7 @@ export default async function TagHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );
--- a/src/years/YearHeader.tsx
+++ b/src/years/YearHeader.tsx
@ -2,7 +2,7 @@

 import { descriptionForPhotoSet, Photo, PhotoDateRange } from '@/photo';
 import PhotoHeader from '@/photo/PhotoHeader';
-import { AI_TEXT_GENERATION_ENABLED } from '@/app/config';
+import { AI_CONTENT_GENERATION_ENABLED } from '@/app/config';
 import PhotoYear from './PhotoYear';
 import { useAppText } from '@/i18n/state/client';

@ -43,7 +43,7 @@ export default function YearHeader({
      indexNumber={indexNumber}
      count={count}
      dateRange={dateRange}
-      hasAiTextGeneration={AI_TEXT_GENERATION_ENABLED}
+      hasAiTextGeneration={AI_CONTENT_GENERATION_ENABLED}
      includeShareButton
    />
  );