diff --git a/src/admin/AdminAddAllUploads.tsx b/src/admin/AdminAddAllUploads.tsx
index 0fc89731..ac5dbd47 100644
--- a/src/admin/AdminAddAllUploads.tsx
+++ b/src/admin/AdminAddAllUploads.tsx
@@ -2,7 +2,7 @@
 
 import ErrorNote from '@/components/ErrorNote';
 import FieldSetWithStatus from '@/components/FieldSetWithStatus';
-import InfoBlock from '@/components/InfoBlock';
+import Container from '@/components/Container';
 import LoaderButton from '@/components/primitives/LoaderButton';
 import { addAllUploadsAction } from '@/photo/actions';
 import { PATH_ADMIN_PHOTOS } from '@/site/paths';
@@ -84,7 +84,7 @@ export default function AdminAddAllUploads({
     <>
       {actionErrorMessage &&
         <ErrorNote>{actionErrorMessage}</ErrorNote>}
-      <InfoBlock padding="tight">
+      <Container padding="tight">
         <div className="w-full space-y-4 py-1">
           <div className="flex">
             <div className={clsx(
@@ -173,7 +173,7 @@ export default function AdminAddAllUploads({
               </div>}
           </div>
         </div>
-      </InfoBlock>
+      </Container>
     </>
   );
 }
diff --git a/src/admin/AdminNavClient.tsx b/src/admin/AdminNavClient.tsx
index e81b7377..98c08c64 100644
--- a/src/admin/AdminNavClient.tsx
+++ b/src/admin/AdminNavClient.tsx
@@ -1,6 +1,6 @@
 'use client';
 
-import Banner from '@/components/Banner';
+import Note from '@/components/Note';
 import SiteGrid from '@/components/SiteGrid';
 import {
   PATH_ADMIN_CONFIGURATION,
@@ -96,10 +96,10 @@ export default function AdminNavClient({
             </Link>
           </div>
           {shouldShowBanner &&
-            <Banner icon={<FaRegClock className="flex-shrink-0" />}>
+            <Note icon={<FaRegClock className="flex-shrink-0" />}>
               Photo updates detected—they may take several minutes to show up
               for visitors
-            </Banner>}
+            </Note>}
         </div>
       }
     />
diff --git a/src/admin/AdminOutdatedClient.tsx b/src/admin/AdminOutdatedClient.tsx
index 80b7db80..cfc19923 100644
--- a/src/admin/AdminOutdatedClient.tsx
+++ b/src/admin/AdminOutdatedClient.tsx
@@ -4,7 +4,7 @@ import { OUTDATED_THRESHOLD, Photo } from '@/photo';
 import AdminPhotosTable from '@/admin/AdminPhotosTable';
 import LoaderButton from '@/components/primitives/LoaderButton';
 import IconGrSync from '@/site/IconGrSync';
-import Banner from '@/components/Banner';
+import Note from '@/components/Note';
 import AdminChildPage from '@/components/AdminChildPage';
 import { PATH_ADMIN_PHOTOS } from '@/site/paths';
 import { useState } from 'react';
@@ -74,7 +74,7 @@ export default function AdminOutdatedClient({
       </LoaderButton>}
     >
       <div className="space-y-6">
-        <Banner>
+        <Note>
           <div className="space-y-1.5">
             {photos.length}
             {' '}
@@ -88,7 +88,7 @@ export default function AdminOutdatedClient({
             undesired privacy settings
             {hasAiTextGeneration && ', missing AI-generated text'}
           </div>
-        </Banner>
+        </Note>
         <div className="space-y-4">
           <AdminPhotosTable
             photos={photos}
diff --git a/src/app/admin/configuration/page.tsx b/src/app/admin/configuration/page.tsx
index 80cbe031..ce4719f3 100644
--- a/src/app/admin/configuration/page.tsx
+++ b/src/app/admin/configuration/page.tsx
@@ -1,5 +1,5 @@
 import ClearCacheButton from '@/admin/ClearCacheButton';
-import InfoBlock from '@/components/InfoBlock';
+import Container from '@/components/Container';
 import SiteGrid from '@/components/SiteGrid';
 import SiteChecklist from '@/site/SiteChecklist';
 
@@ -14,9 +14,9 @@ export default async function AdminConfigurationPage() {
             </div>
             <ClearCacheButton />
           </div>
-          <InfoBlock spaceChildren={false}>
+          <Container spaceChildren={false}>
             <SiteChecklist />
-          </InfoBlock>
+          </Container>
         </div>}
     />
   );
diff --git a/src/app/tag/hidden/page.tsx b/src/app/tag/hidden/page.tsx
index ae5b896e..cb890821 100644
--- a/src/app/tag/hidden/page.tsx
+++ b/src/app/tag/hidden/page.tsx
@@ -1,5 +1,5 @@
 import AnimateItems from '@/components/AnimateItems';
-import Banner from '@/components/Banner';
+import Note from '@/components/Note';
 import SiteGrid from '@/components/SiteGrid';
 import PhotoGrid from '@/photo/PhotoGrid';
 import { getPhotosNoStore } from '@/photo/cache';
@@ -63,9 +63,9 @@ export default async function HiddenTagPage() {
           animateOnFirstLoadOnly
         />
         <div className="space-y-6">
-          <Banner animate>
+          <Note animate>
             Only visible to authenticated admins
-          </Banner>
+          </Note>
           <PhotoGrid {...{ photos }} />
         </div>
       </div>}
diff --git a/src/auth/SignInForm.tsx b/src/auth/SignInForm.tsx
index aa686618..b4b35fc4 100644
--- a/src/auth/SignInForm.tsx
+++ b/src/auth/SignInForm.tsx
@@ -1,7 +1,7 @@
 'use client';
 
 import FieldSetWithStatus from '@/components/FieldSetWithStatus';
-import InfoBlock from '@/components/InfoBlock';
+import Container from '@/components/Container';
 import SubmitButtonWithStatus from '@/components/SubmitButtonWithStatus';
 import { useEffect, useLayoutEffect, useRef, useState } from 'react';
 import { getAuthAction, signInAction } from './actions';
@@ -40,7 +40,7 @@ export default function SignInForm() {
     password.length > 0;
 
   return (
-    <InfoBlock className={clsx(
+    <Container className={clsx(
       'w-[calc(100vw-1.5rem)] sm:w-[min(360px,90vw)]',
       'px-6 py-5',
     )}>
@@ -89,6 +89,6 @@ export default function SignInForm() {
           </SubmitButtonWithStatus>
         </div>
       </form>
-    </InfoBlock>
+    </Container>
   );
 }
diff --git a/src/components/ChecklistRow.tsx b/src/components/ChecklistRow.tsx
index b491a0e1..297a0962 100644
--- a/src/components/ChecklistRow.tsx
+++ b/src/components/ChecklistRow.tsx
@@ -8,6 +8,7 @@ export default function ChecklistRow({
   status,
   isPending,
   optional,
+  showWarning,
   experimental,
   children,
 }: {
@@ -15,6 +16,7 @@ export default function ChecklistRow({
   status: boolean
   isPending?: boolean
   optional?: boolean
+  showWarning?: boolean
   experimental?: boolean
   children: ReactNode
 }) {
@@ -24,7 +26,11 @@ export default function ChecklistRow({
       'px-4 pt-2 pb-2.5',
     )}>
       <StatusIcon
-        type={status ? 'checked' : optional ? 'optional' : 'missing'}
+        type={status
+          ? 'checked'
+          : showWarning
+            ? 'warning'
+            : optional ? 'optional' : 'missing'}
         loading={isPending}
       />
       <div className="flex flex-col min-w-0 flex-grow">
diff --git a/src/components/InfoBlock.tsx b/src/components/Container.tsx
similarity index 74%
rename from src/components/InfoBlock.tsx
rename to src/components/Container.tsx
index 3d622ed7..3bf5bc13 100644
--- a/src/components/InfoBlock.tsx
+++ b/src/components/Container.tsx
@@ -1,7 +1,7 @@
 import { clsx } from 'clsx/lite';
 import { ReactNode } from 'react';
 
-export default function InfoBlock({
+export default function Container({
   children,
   className,
   color = 'gray',
@@ -11,7 +11,7 @@ export default function InfoBlock({
 }: {
   children: ReactNode
   className?: string
-  color?: 'gray' | 'blue'
+  color?: 'gray' | 'blue' | 'red' | 'yellow'
   padding?: 'loose' | 'normal' | 'tight'
   centered?: boolean
   spaceChildren?: boolean
@@ -28,6 +28,16 @@ export default function InfoBlock({
       'bg-blue-50/50 border-blue-200',
       'dark:bg-blue-950/30 dark:border-blue-600/50',
     ];
+    case 'red': return [
+      'text-red-600 dark:text-red-500/90',
+      'bg-red-50/50 dark:bg-red-950/50',
+      'border-red-100 dark:border-red-950',
+    ];
+    case 'yellow': return [
+      'text-amber-700 dark:text-amber-500/90',
+      'bg-amber-50/50 dark:bg-amber-950/30',
+      'border-amber-200/80 dark:border-amber-800/30',
+    ];
     }
   };
 
diff --git a/src/components/ErrorNote.tsx b/src/components/ErrorNote.tsx
index e86a612e..934fa4af 100644
--- a/src/components/ErrorNote.tsx
+++ b/src/components/ErrorNote.tsx
@@ -1,33 +1,22 @@
-import { clsx } from 'clsx/lite';
 import { ReactNode } from 'react';
 import { BiErrorAlt } from 'react-icons/bi';
+import Note from './Note';
 
 export default function ErrorNote({
   className,
   children,
-  size = 'medium',
 }: {
   className?: string
   children: ReactNode
-  size?: 'small' | 'medium'
 }) {
   return (
-    <div className={clsx(
-      'flex w-full items-center gap-3 border',
-      size === 'medium'
-        ? 'px-3 py-2'
-        : 'px-1.5 py-1',
-      'text-red-600 dark:text-red-500/90',
-      'bg-red-50/50 dark:bg-red-950/50',
-      'border-red-100 dark:border-red-950',
-      'rounded-md',
-      className,
-    )}>
-      <BiErrorAlt
-        size={18}
-        className="text-red-600/80 dark:text-red-500/70 shrink-0"
-      />
+    <Note
+      color="red"
+      padding="tight"
+      className={className}
+      icon={<BiErrorAlt size={18} />}
+    >
       {children}
-    </div>
+    </Note>
   );
 }
diff --git a/src/components/Banner.tsx b/src/components/Note.tsx
similarity index 54%
rename from src/components/Banner.tsx
rename to src/components/Note.tsx
index 62e140c7..e141a701 100644
--- a/src/components/Banner.tsx
+++ b/src/components/Note.tsx
@@ -1,38 +1,39 @@
-import { ReactNode } from 'react';
-import InfoBlock from './InfoBlock';
+import { ComponentProps, ReactNode } from 'react';
+import Container from './Container';
 import AnimateItems from './AnimateItems';
 import { IoInformationCircleOutline } from 'react-icons/io5';
 
-export default function Banner({
-  icon,
+export default function Note({
   children,
-  animate,
   className,
+  color = 'blue',
+  icon,
+  animate,
 }: {
   icon?: ReactNode
-  children: ReactNode
   animate?: boolean
-  className?: string
-}) {
+} & ComponentProps<typeof Container>) {
   return (
     <AnimateItems
       type={animate ? 'bottom' : 'none'}
       items={[
-        <InfoBlock
+        <Container
           key="Banner"
           className={className}
           centered={false}
           padding="tight"
-          color="blue"
+          color={color}
         >
           <div className="flex items-center gap-2.5">
-            {icon ?? <IoInformationCircleOutline
-              size={18}
-              className="translate-y-[1px] shrink-0"
-            />}
+            <span className="shrink-0 opacity-90">
+              {icon ?? <IoInformationCircleOutline
+                size={18}
+                className="translate-y-[1px]"
+              />}
+            </span>
             {children}
           </div>
-        </InfoBlock>,
+        </Container>,
       ]}
       animateOnFirstLoadOnly
     />
diff --git a/src/components/StatusIcon.tsx b/src/components/StatusIcon.tsx
index 46dc94de..2021f2c0 100644
--- a/src/components/StatusIcon.tsx
+++ b/src/components/StatusIcon.tsx
@@ -9,7 +9,7 @@ export default function StatusIcon({
   type,
   loading,
 }: {
-  type: 'checked' | 'missing' | 'optional'
+  type: 'checked' | 'missing' | 'warning' | 'optional'
   loading?: boolean
 }) {
   const getIcon = () => {
@@ -24,6 +24,11 @@ export default function StatusIcon({
         size={14}
         className="text-red-400 translate-x-[2px] translate-y-[1.5px]"
       />;
+    case 'warning':
+      return <BiSolidXSquare
+        size={14}
+        className="text-amber-400 translate-x-[2px] translate-y-[1.5px]"
+      />;
     case 'optional':
       return <BiSolidCheckboxMinus
         size={18}
diff --git a/src/components/WarningNote.tsx b/src/components/WarningNote.tsx
new file mode 100644
index 00000000..488d1637
--- /dev/null
+++ b/src/components/WarningNote.tsx
@@ -0,0 +1,22 @@
+import { ReactNode } from 'react';
+import { PiWarningBold } from 'react-icons/pi';
+import Note from './Note';
+
+export default function WarningNote({
+  className,
+  children,
+}: {
+  className?: string
+  children: ReactNode
+}) {
+  return (
+    <Note
+      color="yellow"
+      padding="tight"
+      className={className}
+      icon={<PiWarningBold size={18} />}
+    >
+      {children}
+    </Note>
+  );
+}
diff --git a/src/photo/PhotosEmptyState.tsx b/src/photo/PhotosEmptyState.tsx
index 184a0428..c3b36166 100644
--- a/src/photo/PhotosEmptyState.tsx
+++ b/src/photo/PhotosEmptyState.tsx
@@ -1,5 +1,5 @@
 import AdminCTA from '@/admin/AdminCTA';
-import InfoBlock from '@/components/InfoBlock';
+import Container from '@/components/Container';
 import SiteGrid from '@/components/SiteGrid';
 import { IS_SITE_READY } from '@/site/config';
 import { PATH_ADMIN_CONFIGURATION } from '@/site/paths';
@@ -12,7 +12,7 @@ export default function PhotosEmptyState() {
   return (
     <SiteGrid
       contentMain={
-        <InfoBlock
+        <Container
           className="min-h-[20rem] sm:min-h-[30rem] px-8"
           padding="loose"
         >
@@ -47,7 +47,7 @@ export default function PhotosEmptyState() {
                 </Link>
               </div>
             </div>}
-        </InfoBlock>}
+        </Container>}
     />
   );
 };
diff --git a/src/site/SiteChecklistClient.tsx b/src/site/SiteChecklistClient.tsx
index def9f459..a460293a 100644
--- a/src/site/SiteChecklistClient.tsx
+++ b/src/site/SiteChecklistClient.tsx
@@ -14,7 +14,7 @@ import {
   BiLockAlt,
   BiPencil,
 } from 'react-icons/bi';
-import InfoBlock from '@/components/InfoBlock';
+import Container from '@/components/Container';
 import Checklist from '@/components/Checklist';
 import { toastSuccess } from '@/toast';
 import { ConfigChecklistStatus } from './config';
@@ -25,6 +25,7 @@ import LoaderButton from '@/components/primitives/LoaderButton';
 import { testConnectionsAction } from '@/admin/actions';
 import ErrorNote from '@/components/ErrorNote';
 import Spinner from '@/components/Spinner';
+import WarningNote from '@/components/WarningNote';
 
 export default function SiteChecklistClient({
   // Config checklist
@@ -167,13 +168,27 @@ export default function SiteChecklistClient({
     connection?: { provider: string, error: string }
     message?: string
   }) =>
-    <ErrorNote size="small" className="mt-2 mb-3">
+    <ErrorNote className="mt-2 mb-3">
       {connection && <>
         {connection.provider} connection error: {`"${connection.error}"`}
       </>}
       {message}
     </ErrorNote>;
 
+  const renderWarning = ({
+    connection,
+    message,
+  }: {
+    connection?: { provider: string, error: string }
+    message?: string
+  }) =>
+    <WarningNote className="mt-2 mb-3">
+      {connection && <>
+        {connection.provider} connection error: {`"${connection.error}"`}
+      </>}
+      {message}
+    </WarningNote>;
+
   return (
     <div className="max-w-xl w-full">
       <div className="space-y-6">
@@ -277,7 +292,7 @@ export default function SiteChecklistClient({
             Store auth secret in environment variable:
             {!hasAuthSecret &&
               <div className="overflow-x-auto">
-                <InfoBlock className="my-1.5 inline-flex" padding="tight">
+                <Container className="my-1.5 inline-flex" padding="tight">
                   <div className={clsx(
                     'flex flex-nowrap items-center gap-2 leading-none -mx-1',
                   )}>
@@ -288,7 +303,7 @@ export default function SiteChecklistClient({
                       {renderCopyButton('Secret', secret)}
                     </div>
                   </div>
-                </InfoBlock>
+                </Container>
               </div>}
             {renderEnvVars(['AUTH_SECRET'])}
           </ChecklistRow>
@@ -314,8 +329,8 @@ export default function SiteChecklistClient({
             status={hasDomain}
           >
             {!hasDomain &&
-              renderError({message:
-                'Not configuring a domain may cause ' + 
+              renderWarning({message:
+                'Not explicitly setting a domain may cause ' + 
                 'certain features to behave unexpectedly',
               })}
             Store in environment variable (displayed in top-right nav):