diff --git a/src/client/ClientGameRunner.ts b/src/client/ClientGameRunner.ts
index fbb1b83aa..9524e7c1b 100644
--- a/src/client/ClientGameRunner.ts
+++ b/src/client/ClientGameRunner.ts
@@ -162,6 +162,7 @@ async function createClientGame(
   const worker = new WorkerClient(
     lobbyConfig.gameStartInfo,
     lobbyConfig.clientID,
+    userSettings,
   );
   await worker.initialize();
   const gameView = new GameView(
diff --git a/src/core/GameRunner.ts b/src/core/GameRunner.ts
index 55b214877..2abadcd5f 100644
--- a/src/core/GameRunner.ts
+++ b/src/core/GameRunner.ts
@@ -27,6 +27,7 @@ import {
   GameUpdateViewData,
 } from "./game/GameUpdates";
 import { loadTerrainMap as loadGameMap } from "./game/TerrainMapLoader";
+import { IUserSettings } from "./game/UserSettings";
 import { PseudoRandom } from "./PseudoRandom";
 import { ClientID, GameStartInfo, Turn } from "./Schemas";
 import { sanitize, simpleHash } from "./Util";
@@ -37,8 +38,9 @@ export async function createGameRunner(
   clientID: ClientID,
   mapLoader: GameMapLoader,
   callBack: (gu: GameUpdateViewData | ErrorUpdate) => void,
+  userSettings: IUserSettings,
 ): Promise<GameRunner> {
-  const config = await getConfig(gameStart.config, null);
+  const config = await getConfig(gameStart.config, userSettings);
   const gameMap = await loadGameMap(
     gameStart.config.gameMap,
     gameStart.config.gameMapSize,
diff --git a/src/core/configuration/ColorAllocator.ts b/src/core/configuration/ColorAllocator.ts
index e4fc572f8..30257fcdd 100644
--- a/src/core/configuration/ColorAllocator.ts
+++ b/src/core/configuration/ColorAllocator.ts
@@ -3,7 +3,7 @@ import labPlugin from "colord/plugins/lab";
 import lchPlugin from "colord/plugins/lch";
 import Color from "colorjs.io";
 import { ColoredTeams, Team } from "../game/Game";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { PseudoRandom } from "../PseudoRandom";
 import { simpleHash } from "../Util";
 import {
@@ -31,7 +31,7 @@ export class ColorAllocator {
   constructor(
     colors: Colord[],
     fallback: Colord[],
-    private userSettings: UserSettings,
+    private userSettings: IUserSettings,
   ) {
     this.availableColors = [...colors];
     this.fallbackColors = [...colors, ...fallback];
diff --git a/src/core/configuration/Config.ts b/src/core/configuration/Config.ts
index 0fb16b490..f55fb886a 100644
--- a/src/core/configuration/Config.ts
+++ b/src/core/configuration/Config.ts
@@ -16,7 +16,7 @@ import {
 } from "../game/Game";
 import { GameMap, TileRef } from "../game/GameMap";
 import { PlayerView } from "../game/GameView";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { GameConfig, GameID, TeamCountConfig } from "../Schemas";
 import { NukeType } from "../StatsSchemas";
 
@@ -89,7 +89,7 @@ export interface Config {
   donateTroops(): boolean;
   instantBuild(): boolean;
   numSpawnPhaseTurns(): number;
-  userSettings(): UserSettings;
+  userSettings(): IUserSettings;
   playerTeams(): TeamCountConfig;
 
   startManpower(playerInfo: PlayerInfo): number;
diff --git a/src/core/configuration/ConfigLoader.ts b/src/core/configuration/ConfigLoader.ts
index 184902694..b9a040b7f 100644
--- a/src/core/configuration/ConfigLoader.ts
+++ b/src/core/configuration/ConfigLoader.ts
@@ -1,4 +1,4 @@
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { GameConfig } from "../Schemas";
 import { Config, GameEnv, ServerConfig } from "./Config";
 import { DefaultConfig } from "./DefaultConfig";
@@ -10,7 +10,7 @@ export let cachedSC: ServerConfig | null = null;
 
 export async function getConfig(
   gameConfig: GameConfig,
-  userSettings: UserSettings | null,
+  userSettings: IUserSettings | null,
   isReplay: boolean = false,
 ): Promise<Config> {
   const sc = await getServerConfigFromClient();
diff --git a/src/core/configuration/DefaultConfig.ts b/src/core/configuration/DefaultConfig.ts
index 89f7daaed..c75a4cb9e 100644
--- a/src/core/configuration/DefaultConfig.ts
+++ b/src/core/configuration/DefaultConfig.ts
@@ -21,7 +21,7 @@ import {
 } from "../game/Game";
 import { TileRef } from "../game/GameMap";
 import { PlayerView } from "../game/GameView";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { GameConfig, GameID, TeamCountConfig } from "../Schemas";
 import { NukeType } from "../StatsSchemas";
 import { assertNever, sigmoid, simpleHash, within } from "../Util";
@@ -225,7 +225,7 @@ export class DefaultConfig implements Config {
   constructor(
     private _serverConfig: ServerConfig,
     private _gameConfig: GameConfig,
-    private _userSettings: UserSettings | null,
+    private _userSettings: IUserSettings | null,
     private _isReplay: boolean,
   ) {
     this.pastelTheme = new PastelTheme(this.userSettings());
@@ -269,7 +269,7 @@ export class DefaultConfig implements Config {
     return this._serverConfig;
   }
 
-  userSettings(): UserSettings {
+  userSettings(): IUserSettings {
     if (this._userSettings === null) {
       throw new Error("userSettings is null");
     }
diff --git a/src/core/configuration/DevConfig.ts b/src/core/configuration/DevConfig.ts
index 20b63e8f9..c84c88f4b 100644
--- a/src/core/configuration/DevConfig.ts
+++ b/src/core/configuration/DevConfig.ts
@@ -1,5 +1,5 @@
 import { UnitInfo, UnitType } from "../game/Game";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { GameConfig } from "../Schemas";
 import { GameEnv, ServerConfig } from "./Config";
 import { DefaultConfig, DefaultServerConfig } from "./DefaultConfig";
@@ -52,7 +52,7 @@ export class DevConfig extends DefaultConfig {
   constructor(
     sc: ServerConfig,
     gc: GameConfig,
-    us: UserSettings | null,
+    us: IUserSettings | null,
     isReplay: boolean,
   ) {
     super(sc, gc, us, isReplay);
diff --git a/src/core/configuration/PastelTheme.ts b/src/core/configuration/PastelTheme.ts
index cda3d8bc2..a11f470df 100644
--- a/src/core/configuration/PastelTheme.ts
+++ b/src/core/configuration/PastelTheme.ts
@@ -3,7 +3,7 @@ import { PseudoRandom } from "../PseudoRandom";
 import { PlayerType, Team, TerrainType } from "../game/Game";
 import { GameMap, TileRef } from "../game/GameMap";
 import { PlayerView } from "../game/GameView";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { ColorAllocator } from "./ColorAllocator";
 import { botColors, fallbackColors, humanColors, nationColors } from "./Colors";
 import { Theme } from "./Config";
@@ -18,7 +18,7 @@ export class PastelTheme implements Theme {
   private teamColorAllocator: ColorAllocator;
   private nationColorAllocator: ColorAllocator;
 
-  constructor(private userSettings: UserSettings) {
+  constructor(private userSettings: IUserSettings) {
     this.humanColorAllocator = new ColorAllocator(
       humanColors,
       fallbackColors,
diff --git a/src/core/configuration/PastelThemeDark.ts b/src/core/configuration/PastelThemeDark.ts
index 3f27564ae..d5a4dc0ad 100644
--- a/src/core/configuration/PastelThemeDark.ts
+++ b/src/core/configuration/PastelThemeDark.ts
@@ -1,7 +1,7 @@
 import { Colord, colord } from "colord";
 import { TerrainType } from "../game/Game";
 import { GameMap, TileRef } from "../game/GameMap";
-import { UserSettings } from "../game/UserSettings";
+import { IUserSettings } from "../game/UserSettings";
 import { PastelTheme } from "./PastelTheme";
 
 export class PastelThemeDark extends PastelTheme {
@@ -10,7 +10,7 @@ export class PastelThemeDark extends PastelTheme {
   private darkWater = colord({ r: 14, g: 11, b: 30 });
   private darkShorelineWater = colord({ r: 50, g: 50, b: 50 });
 
-  constructor(userSettings: UserSettings) {
+  constructor(userSettings: IUserSettings) {
     super(userSettings);
   }
 
diff --git a/src/core/game/UserSettings.ts b/src/core/game/UserSettings.ts
index 817484b5c..a2fc9c197 100644
--- a/src/core/game/UserSettings.ts
+++ b/src/core/game/UserSettings.ts
@@ -3,7 +3,41 @@ import { PlayerPattern } from "../Schemas";
 
 const PATTERN_KEY = "territoryPattern";
 
-export class UserSettings {
+export interface UserSettingsData {
+  emojis: boolean;
+  performanceOverlay: boolean;
+  alertFrame: boolean;
+  anonymousNames: boolean;
+  lobbyIdVisibility: boolean;
+  fxLayer: boolean;
+  structureSprites: boolean;
+  darkMode: boolean;
+  leftClickOpensMenu: boolean;
+  territoryPatterns: boolean;
+  focusLocked: boolean;
+  colorblindMode: boolean;
+  backgroundMusicVolume: number;
+  soundEffectsVolume: number;
+}
+
+export interface IUserSettings {
+  emojis(): boolean;
+  performanceOverlay(): boolean;
+  alertFrame(): boolean;
+  anonymousNames(): boolean;
+  lobbyIdVisibility(): boolean;
+  fxLayer(): boolean;
+  structureSprites(): boolean;
+  darkMode(): boolean;
+  leftClickOpensMenu(): boolean;
+  territoryPatterns(): boolean;
+  focusLocked(): boolean;
+  colorblindMode(): boolean;
+  backgroundMusicVolume(): number;
+  soundEffectsVolume(): number;
+}
+
+export class UserSettings implements IUserSettings {
   get(key: string, defaultValue: boolean): boolean {
     const value = localStorage.getItem(key);
     if (!value) return defaultValue;
@@ -33,6 +67,25 @@ export class UserSettings {
     localStorage.setItem(key, value.toString());
   }
 
+  getData(): UserSettingsData {
+    return {
+      emojis: this.emojis(),
+      performanceOverlay: this.performanceOverlay(),
+      alertFrame: this.alertFrame(),
+      anonymousNames: this.anonymousNames(),
+      lobbyIdVisibility: this.lobbyIdVisibility(),
+      fxLayer: this.fxLayer(),
+      structureSprites: this.structureSprites(),
+      darkMode: this.darkMode(),
+      leftClickOpensMenu: this.leftClickOpensMenu(),
+      territoryPatterns: this.territoryPatterns(),
+      focusLocked: this.focusLocked(),
+      colorblindMode: this.colorblindMode(),
+      backgroundMusicVolume: this.backgroundMusicVolume(),
+      soundEffectsVolume: this.soundEffectsVolume(),
+    };
+  }
+
   emojis() {
     return this.get("settings.emojis", true);
   }
diff --git a/src/core/worker/Worker.worker.ts b/src/core/worker/Worker.worker.ts
index 1014968fb..e4075adac 100644
--- a/src/core/worker/Worker.worker.ts
+++ b/src/core/worker/Worker.worker.ts
@@ -2,6 +2,7 @@ import version from "../../../resources/version.txt";
 import { createGameRunner, GameRunner } from "../GameRunner";
 import { FetchGameMapLoader } from "../game/FetchGameMapLoader";
 import { ErrorUpdate, GameUpdateViewData } from "../game/GameUpdates";
+import { IUserSettings, UserSettingsData } from "../game/UserSettings";
 import {
   AttackAveragePositionResultMessage,
   InitializedMessage,
@@ -17,6 +18,53 @@ const ctx: Worker = self as any;
 let gameRunner: Promise<GameRunner> | null = null;
 const mapLoader = new FetchGameMapLoader(`/maps`, version);
 
+class MockUserSettings implements IUserSettings {
+  constructor(private data: UserSettingsData) {}
+
+  emojis(): boolean {
+    return this.data.emojis;
+  }
+  performanceOverlay(): boolean {
+    return this.data.performanceOverlay;
+  }
+  alertFrame(): boolean {
+    return this.data.alertFrame;
+  }
+  anonymousNames(): boolean {
+    return this.data.anonymousNames;
+  }
+  lobbyIdVisibility(): boolean {
+    return this.data.lobbyIdVisibility;
+  }
+  fxLayer(): boolean {
+    return this.data.fxLayer;
+  }
+  structureSprites(): boolean {
+    return this.data.structureSprites;
+  }
+  darkMode(): boolean {
+    return this.data.darkMode;
+  }
+  leftClickOpensMenu(): boolean {
+    return this.data.leftClickOpensMenu;
+  }
+  territoryPatterns(): boolean {
+    return this.data.territoryPatterns;
+  }
+  focusLocked(): boolean {
+    return this.data.focusLocked;
+  }
+  colorblindMode(): boolean {
+    return this.data.colorblindMode;
+  }
+  backgroundMusicVolume(): number {
+    return this.data.backgroundMusicVolume;
+  }
+  soundEffectsVolume(): number {
+    return this.data.soundEffectsVolume;
+  }
+}
+
 function gameUpdate(gu: GameUpdateViewData | ErrorUpdate) {
   // skip if ErrorUpdate
   if (!("updates" in gu)) {
@@ -41,11 +89,13 @@ ctx.addEventListener("message", async (e: MessageEvent<MainThreadMessage>) => {
       break;
     case "init":
       try {
+        const userSettings = new MockUserSettings(message.userSettings);
         gameRunner = createGameRunner(
           message.gameStartInfo,
           message.clientID,
           mapLoader,
           gameUpdate,
+          userSettings,
         ).then((gr) => {
           sendMessage({
             type: "initialized",
diff --git a/src/core/worker/WorkerClient.ts b/src/core/worker/WorkerClient.ts
index bde436f39..dc2f2b6e0 100644
--- a/src/core/worker/WorkerClient.ts
+++ b/src/core/worker/WorkerClient.ts
@@ -7,6 +7,7 @@ import {
 } from "../game/Game";
 import { TileRef } from "../game/GameMap";
 import { ErrorUpdate, GameUpdateViewData } from "../game/GameUpdates";
+import { UserSettings } from "../game/UserSettings";
 import { ClientID, GameStartInfo, Turn } from "../Schemas";
 import { generateID } from "../Util";
 import { WorkerMessage } from "./WorkerMessages";
@@ -22,6 +23,7 @@ export class WorkerClient {
   constructor(
     private gameStartInfo: GameStartInfo,
     private clientID: ClientID,
+    private userSettings: UserSettings,
   ) {
     this.worker = new Worker(new URL("./Worker.worker.ts", import.meta.url));
     this.messageHandlers = new Map();
@@ -70,6 +72,7 @@ export class WorkerClient {
         id: messageId,
         gameStartInfo: this.gameStartInfo,
         clientID: this.clientID,
+        userSettings: this.userSettings.getData(),
       });
 
       // Add timeout for initialization
diff --git a/src/core/worker/WorkerMessages.ts b/src/core/worker/WorkerMessages.ts
index a8d30e9b1..875602763 100644
--- a/src/core/worker/WorkerMessages.ts
+++ b/src/core/worker/WorkerMessages.ts
@@ -6,6 +6,7 @@ import {
 } from "../game/Game";
 import { TileRef } from "../game/GameMap";
 import { GameUpdateViewData } from "../game/GameUpdates";
+import { UserSettingsData } from "../game/UserSettings";
 import { ClientID, GameStartInfo, Turn } from "../Schemas";
 
 export type WorkerMessageType =
@@ -40,6 +41,7 @@ export interface InitMessage extends BaseWorkerMessage {
   type: "init";
   gameStartInfo: GameStartInfo;
   clientID: ClientID;
+  userSettings: UserSettingsData;
 }
 
 export interface TurnMessage extends BaseWorkerMessage {
diff --git a/tests/Colors.test.ts b/tests/Colors.test.ts
index 02810c675..0151c31e2 100644
--- a/tests/Colors.test.ts
+++ b/tests/Colors.test.ts
@@ -14,7 +14,7 @@ import {
   yellow,
 } from "../src/core/configuration/Colors";
 import { ColoredTeams } from "../src/core/game/Game";
-import { UserSettings } from "../src/core/game/UserSettings";
+import { IUserSettings } from "../src/core/game/UserSettings";
 
 const mockColors: Colord[] = [
   colord({ r: 255, g: 0, b: 0 }),
@@ -31,7 +31,7 @@ const fallbackColors = [...fallbackMockColors, ...mockColors];
 
 const mockUserSettings = {
   colorblindMode: () => false,
-} as UserSettings;
+} as IUserSettings;
 
 describe("ColorAllocator", () => {
   let allocator: ColorAllocator;
@@ -157,6 +157,24 @@ describe("ColorAllocator", () => {
 
     expect(redColorPlayerOne.isEqual(redColorPlayerTwo)).toBe(false);
   });
+
+  test("assignTeamColor returns colorblind-friendly colors when colorblind mode is enabled", () => {
+    const mockUserSettingsColorblind = {
+      colorblindMode: () => true,
+    } as IUserSettings;
+
+    const allocator = new ColorAllocator(
+      mockColors,
+      fallbackMockColors,
+      mockUserSettingsColorblind,
+    );
+
+    const redColor = allocator.assignTeamColor(ColoredTeams.Red);
+    const greenColor = allocator.assignTeamColor(ColoredTeams.Green);
+
+    expect(redColor.toHex()).toBe(colord({ h: 30, s: 100, l: 50 }).toHex()); // Orange
+    expect(greenColor.toHex()).toBe(colord({ h: 210, s: 100, l: 50 }).toHex()); // Blue
+  });
 });
 
 describe("selectDistinctColor", () => {