diff --git a/docs/docs/game-support/games/arcaea-Touch.md b/docs/docs/game-support/games/arcaea-Touch.md
index 3752655eb..6b9832d8e 100644
--- a/docs/docs/game-support/games/arcaea-Touch.md
+++ b/docs/docs/game-support/games/arcaea-Touch.md
@@ -71,7 +71,7 @@ The following judgements are defined:
 | Name | Type | Values |
 | :: | :: | :: |
 | `badge` | DERIVED | BLUE, GREEN, ASH_PURPLE, PURPLE, RED, ONE_STAR, TWO_STARS, THREE_STARS
-| `courseBanner` | PROVIDED | PHASE_1, PHASE_2, PHASE_3, PHASE_4, PHASE_5, PHASE_6, PHASE_7, PHASE_8, PHASE_9, PHASE_10, PHASE_11
+| `courseBanner` | PROVIDED | PHASE_1, PHASE_2, PHASE_3, PHASE_4, PHASE_5, PHASE_6, PHASE_7, PHASE_8, PHASE_9, PHASE_10, PHASE_11, PHASE_12
 
 ## Versions
 
diff --git a/typescript/client/src/lib/games/arcaea.tsx b/typescript/client/src/lib/games/arcaea.tsx
index 2d9802d88..90f6c44cd 100644
--- a/typescript/client/src/lib/games/arcaea.tsx
+++ b/typescript/client/src/lib/games/arcaea.tsx
@@ -63,6 +63,7 @@ const ARCAEA_COLORS: GPTClientImplementation<GamesForGroup["arcaea"]>["classColo
 		PHASE_9: bgc("indigo", "var(--bs-light)"),
 		PHASE_10: bgc("firebrick", "var(--bs-light)"),
 		PHASE_11: bgc("darkred", "var(--bs-light)"),
+		PHASE_12: bgc("blueviolet", "var(--bs-light)"),
 	},
 };
 
diff --git a/typescript/common/src/config/game-support/arcaea.ts b/typescript/common/src/config/game-support/arcaea.ts
index 293956360..f26b4cd29 100644
--- a/typescript/common/src/config/game-support/arcaea.ts
+++ b/typescript/common/src/config/game-support/arcaea.ts
@@ -41,6 +41,7 @@ const ArcaeaClasses = [
 	ClassValue("PHASE_9", "Phase 9", "Ego's Demise"),
 	ClassValue("PHASE_10", "Phase 10", "A Torrent of Light and Conflict"),
 	ClassValue("PHASE_11", "Phase 11", "Radiant Genesis"),
+	ClassValue("PHASE_12", "Phase 12", "Irruption of New Color"),
 ];
 
 export const GAME_ARCAEA_CONF = {
diff --git a/typescript/common/src/constants/game.ts b/typescript/common/src/constants/game.ts
index 9ee014504..ee7c11880 100644
--- a/typescript/common/src/constants/game.ts
+++ b/typescript/common/src/constants/game.ts
@@ -572,6 +572,7 @@ export enum ARCAEA_COURSE_BANNERS {
 	PHASE_9 = 8,
 	PHASE_10 = 9,
 	PHASE_11 = 10,
+	PHASE_12 = 11,
 }
 
 export enum ONGEKI_NOTE_LAMPS {