diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26ff198eb..550a5fcf9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@ You should also include the user name that made the change.
 	- e.g. `https://p1.a9z.dev/emoji/misskey.webp`
 	- remote: `https://p1.a9z.dev/emoji/syuilo_birth_present@mk.f72u.net.webp`
 - API: `user`および`note`エンティティに`emojis`プロパティが含まれなくなりました
+- API: `user`エンティティに`avatarColor`および`bannerColor`プロパティが含まれなくなりました
 
 ### Improvements
 - Push notification of Antenna note @tamaina
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 3f7575549..a12374622 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -392,7 +392,6 @@ export class UserEntityService implements OnModuleInit {
 			host: user.host,
 			avatarUrl: this.getAvatarUrlSync(user),
 			avatarBlurhash: user.avatar?.blurhash ?? null,
-			avatarColor: null, // 後方互換性のため
 			isAdmin: user.isAdmin ?? falsy,
 			isModerator: user.isModerator ?? falsy,
 			isBot: user.isBot ?? falsy,
@@ -418,7 +417,6 @@ export class UserEntityService implements OnModuleInit {
 				lastFetchedAt: user.lastFetchedAt ? user.lastFetchedAt.toISOString() : null,
 				bannerUrl: user.banner ? this.driveFileEntityService.getPublicUrl(user.banner, false) : null,
 				bannerBlurhash: user.banner?.blurhash ?? null,
-				bannerColor: null, // 後方互換性のため
 				isLocked: user.isLocked,
 				isSilenced: user.isSilenced ?? falsy,
 				isSuspended: user.isSuspended ?? falsy,
diff --git a/packages/backend/src/models/schema/user.ts b/packages/backend/src/models/schema/user.ts
index dd549ad0d..aac5e9332 100644
--- a/packages/backend/src/models/schema/user.ts
+++ b/packages/backend/src/models/schema/user.ts
@@ -32,11 +32,6 @@ export const packedUserLiteSchema = {
 			type: 'any',
 			nullable: true, optional: false,
 		},
-		avatarColor: {
-			type: 'any',
-			nullable: true, optional: false,
-			default: null,
-		},
 		isAdmin: {
 			type: 'boolean',
 			nullable: false, optional: true,
@@ -101,11 +96,6 @@ export const packedUserDetailedNotMeOnlySchema = {
 			type: 'any',
 			nullable: true, optional: false,
 		},
-		bannerColor: {
-			type: 'any',
-			nullable: true, optional: false,
-			default: null,
-		},
 		isLocked: {
 			type: 'boolean',
 			nullable: false, optional: false,