diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 66d04a3..42e0e2d 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -5717,6 +5717,25 @@
     }
 
     /**
+     * Used by ThemeOverlayController to notify when color
+     * palette is ready.
+     *
+     * @param userId The ID of the user where ThemeOverlayController is ready.
+     *
+     * @throws RemoteException
+     *
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.SET_THEME_OVERLAY_CONTROLLER_READY)
+    public void setThemeOverlayReady(@UserIdInt int userId) {
+        try {
+            getService().setThemeOverlayReady(userId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Resets the state of the {@link com.android.server.am.AppErrors} instance.
      * This is intended for use with CTS only.
      * @hide
diff --git a/core/java/android/app/ActivityManagerInternal.java b/core/java/android/app/ActivityManagerInternal.java
index 32c40df..384d7db 100644
--- a/core/java/android/app/ActivityManagerInternal.java
+++ b/core/java/android/app/ActivityManagerInternal.java
@@ -1234,4 +1234,11 @@
      */
     public abstract boolean clearApplicationUserData(String packageName, boolean keepState,
             boolean isRestore, IPackageDataObserver observer, int userId);
+
+    /**
+     * Returns current state of {@link com.android.systemui.theme.ThemeOverlayController} color
+     * palette readiness.
+     * @hide
+     */
+    public abstract boolean isThemeOverlayReady(int userId);
 }
diff --git a/core/java/android/app/IActivityManager.aidl b/core/java/android/app/IActivityManager.aidl
index 37616e7..30dd374 100644
--- a/core/java/android/app/IActivityManager.aidl
+++ b/core/java/android/app/IActivityManager.aidl
@@ -550,6 +550,17 @@
     @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     boolean isTopOfTask(in IBinder token);
     void bootAnimationComplete();
+
+    /**
+     * Used by {@link com.android.systemui.theme.ThemeOverlayController} to notify when color
+     * palette is ready.
+     *
+     * @param userId The ID of the user where ThemeOverlayController is ready.
+     *
+     * @throws RemoteException
+     */
+    void setThemeOverlayReady(int userId);
+
     @UnsupportedAppUsage
     void registerTaskStackListener(in ITaskStackListener listener);
     void unregisterTaskStackListener(in ITaskStackListener listener);
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index cbb6e74..fbe678f 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -7302,6 +7302,11 @@
     <permission android:name="android.permission.RESET_APP_ERRORS"
         android:protectionLevel="signature" />
 
+    <!-- @hide Allows ThemeOverlayController to delay launch of Home / SetupWizard on boot, ensuring
+      Theme Palettes and Colors are ready  -->
+    <permission android:name="android.permission.SET_THEME_OVERLAY_CONTROLLER_READY"
+        android:protectionLevel="signature|setup" />
+
     <!-- @hide Allows an application to create/destroy input consumer. -->
     <permission android:name="android.permission.INPUT_CONSUMER"
                 android:protectionLevel="signature" />
diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index 4fd4723..2d9b1ee 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -256,6 +256,9 @@
 
     <uses-permission android:name="android.permission.MODIFY_THEME_OVERLAY" />
 
+    <!-- Activity Manager -->
+    <uses-permission android:name="android.permission.SET_THEME_OVERLAY_CONTROLLER_READY" />
+
     <!-- accessibility -->
     <uses-permission android:name="android.permission.MODIFY_ACCESSIBILITY_DATA" />
     <uses-permission android:name="android.permission.MANAGE_ACCESSIBILITY" />
diff --git a/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayApplier.java b/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayApplier.java
index 3376e23..91df866 100644
--- a/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayApplier.java
+++ b/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayApplier.java
@@ -32,6 +32,7 @@
 import com.android.systemui.Dumpable;
 import com.android.systemui.dagger.SysUISingleton;
 import com.android.systemui.dagger.qualifiers.Background;
+import com.android.systemui.dagger.qualifiers.Main;
 import com.android.systemui.dump.DumpManager;
 
 import com.google.android.collect.Lists;
@@ -142,6 +143,7 @@
     private final Map<String, String> mCategoryToTargetPackage = new ArrayMap<>();
     private final OverlayManager mOverlayManager;
     private final Executor mBgExecutor;
+    private final Executor mMainExecutor;
     private final String mLauncherPackage;
     private final String mThemePickerPackage;
 
@@ -150,9 +152,11 @@
             @Background Executor bgExecutor,
             @Named(ThemeModule.LAUNCHER_PACKAGE) String launcherPackage,
             @Named(ThemeModule.THEME_PICKER_PACKAGE) String themePickerPackage,
-            DumpManager dumpManager) {
+            DumpManager dumpManager,
+            @Main Executor mainExecutor) {
         mOverlayManager = overlayManager;
         mBgExecutor = bgExecutor;
+        mMainExecutor = mainExecutor;
         mLauncherPackage = launcherPackage;
         mThemePickerPackage = themePickerPackage;
         mTargetPackageToCategories.put(ANDROID_PACKAGE, Sets.newHashSet(
@@ -184,12 +188,21 @@
     /**
      * Apply the set of overlay packages to the set of {@code UserHandle}s provided. Overlays that
      * affect sysui will also be applied to the system user.
+     *
+     * @param categoryToPackage Overlay packages to be applied
+     * @param pendingCreation Overlays yet to be created
+     * @param currentUser Current User ID
+     * @param managedProfiles Profiles get overlays
+     * @param onComplete Callback for when resources are ready. Runs in the main thread.
      */
     public void applyCurrentUserOverlays(
             Map<String, OverlayIdentifier> categoryToPackage,
             FabricatedOverlay[] pendingCreation,
             int currentUser,
-            Set<UserHandle> managedProfiles) {
+            Set<UserHandle> managedProfiles,
+            Runnable onComplete
+    ) {
+
         mBgExecutor.execute(() -> {
 
             // Disable all overlays that have not been specified in the user setting.
@@ -236,6 +249,10 @@
 
             try {
                 mOverlayManager.commit(transaction.build());
+                if (onComplete != null) {
+                    Log.d(TAG, "Executing onComplete runnable");
+                    mMainExecutor.execute(onComplete);
+                }
             } catch (SecurityException | IllegalStateException e) {
                 Log.e(TAG, "setEnabled failed", e);
             }
diff --git a/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayController.java b/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayController.java
index 5a9f5d5..8e69499 100644
--- a/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayController.java
+++ b/packages/SystemUI/src/com/android/systemui/theme/ThemeOverlayController.java
@@ -30,6 +30,7 @@
 import static com.android.systemui.theme.ThemeOverlayApplier.OVERLAY_COLOR_SOURCE;
 import static com.android.systemui.theme.ThemeOverlayApplier.TIMESTAMP_FIELD;
 
+import android.app.ActivityManager;
 import android.app.UiModeManager;
 import android.app.WallpaperColors;
 import android.app.WallpaperManager;
@@ -137,6 +138,7 @@
     // Current wallpaper colors associated to a user.
     private final SparseArray<WallpaperColors> mCurrentColors = new SparseArray<>();
     private final WallpaperManager mWallpaperManager;
+    private final ActivityManager mActivityManager;
     @VisibleForTesting
     protected ColorScheme mColorScheme;
     // If fabricated overlays were already created for the current theme.
@@ -395,7 +397,8 @@
             FeatureFlags featureFlags,
             @Main Resources resources,
             WakefulnessLifecycle wakefulnessLifecycle,
-            UiModeManager uiModeManager) {
+            UiModeManager uiModeManager,
+            ActivityManager activityManager) {
         mContext = context;
         mIsMonochromaticEnabled = featureFlags.isEnabled(Flags.MONOCHROMATIC_THEME);
         mIsMonetEnabled = featureFlags.isEnabled(Flags.MONET);
@@ -413,6 +416,7 @@
         mResources = resources;
         mWakefulnessLifecycle = wakefulnessLifecycle;
         mUiModeManager = uiModeManager;
+        mActivityManager = activityManager;
         dumpManager.registerDumpable(TAG, this);
     }
 
@@ -764,8 +768,14 @@
             }
         }
 
+        final Runnable onCompleteCallback = () -> {
+            Log.d(TAG, "ThemeHomeDelay: ThemeOverlayController ready");
+            mActivityManager.setThemeOverlayReady(currentUser);
+        };
+
         if (colorSchemeIsApplied(managedProfiles)) {
             Log.d(TAG, "Skipping overlay creation. Theme was already: " + mColorScheme);
+            onCompleteCallback.run();
             return;
         }
 
@@ -774,16 +784,20 @@
                     .map(key -> key + " -> " + categoryToPackage.get(key)).collect(
                             Collectors.joining(", ")));
         }
+
+        FabricatedOverlay[] fOverlays = null;
+
         if (mNeedsOverlayCreation) {
             mNeedsOverlayCreation = false;
-            mThemeManager.applyCurrentUserOverlays(categoryToPackage, new FabricatedOverlay[]{
+            fOverlays = new FabricatedOverlay[]{
                     mSecondaryOverlay, mNeutralOverlay, mDynamicOverlay
-            }, currentUser, managedProfiles);
-        } else {
-            mThemeManager.applyCurrentUserOverlays(categoryToPackage, null, currentUser,
-                    managedProfiles);
+            };
         }
-    }
+
+        mThemeManager.applyCurrentUserOverlays(categoryToPackage, fOverlays, currentUser,
+                managedProfiles, onCompleteCallback);
+
+        }
 
     private Style fetchThemeStyleFromSetting() {
         // Allow-list of Style objects that can be created from a setting string, i.e. can be
diff --git a/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayApplierTest.java b/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayApplierTest.java
index 83439f0..8f4cbaf 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayApplierTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayApplierTest.java
@@ -104,9 +104,9 @@
     @Before
     public void setup() throws Exception {
         MockitoAnnotations.initMocks(this);
-        mManager = new ThemeOverlayApplier(mOverlayManager,
-                MoreExecutors.directExecutor(),
-                LAUNCHER_PACKAGE, THEMEPICKER_PACKAGE, mDumpManager) {
+        mManager = new ThemeOverlayApplier(mOverlayManager, MoreExecutors.directExecutor(),
+                LAUNCHER_PACKAGE, THEMEPICKER_PACKAGE, mDumpManager,
+                MoreExecutors.directExecutor()) {
             @Override
             protected OverlayManagerTransaction.Builder getTransactionBuilder() {
                 return mTransactionBuilder;
@@ -179,7 +179,7 @@
     @Test
     public void allCategoriesSpecified_allEnabledExclusively() {
         mManager.applyCurrentUserOverlays(ALL_CATEGORIES_MAP, null, TEST_USER.getIdentifier(),
-                TEST_USER_HANDLES);
+                TEST_USER_HANDLES, null);
         verify(mOverlayManager).commit(any());
 
         for (OverlayIdentifier overlayPackage : ALL_CATEGORIES_MAP.values()) {
@@ -191,7 +191,7 @@
     @Test
     public void allCategoriesSpecified_sysuiCategoriesAlsoAppliedToSysuiUser() {
         mManager.applyCurrentUserOverlays(ALL_CATEGORIES_MAP, null, TEST_USER.getIdentifier(),
-                TEST_USER_HANDLES);
+                TEST_USER_HANDLES, null);
 
         for (Map.Entry<String, OverlayIdentifier> entry : ALL_CATEGORIES_MAP.entrySet()) {
             if (SYSTEM_USER_CATEGORIES.contains(entry.getKey())) {
@@ -208,7 +208,7 @@
     public void allCategoriesSpecified_enabledForAllUserHandles() {
         Set<UserHandle> userHandles = Sets.newHashSet(TEST_USER_HANDLES);
         mManager.applyCurrentUserOverlays(ALL_CATEGORIES_MAP, null, TEST_USER.getIdentifier(),
-                userHandles);
+                userHandles, null);
 
         for (OverlayIdentifier overlayPackage : ALL_CATEGORIES_MAP.values()) {
             verify(mTransactionBuilder).setEnabled(eq(overlayPackage), eq(true),
@@ -225,7 +225,7 @@
 
         Set<UserHandle> userHandles = Sets.newHashSet(TEST_USER_HANDLES);
         mManager.applyCurrentUserOverlays(ALL_CATEGORIES_MAP, null, TEST_USER.getIdentifier(),
-                userHandles);
+                userHandles, null);
 
         for (OverlayIdentifier overlayPackage : ALL_CATEGORIES_MAP.values()) {
             verify(mTransactionBuilder, never()).setEnabled(eq(overlayPackage), eq(true),
@@ -239,7 +239,7 @@
                 mock(FabricatedOverlay.class)
         };
         mManager.applyCurrentUserOverlays(ALL_CATEGORIES_MAP, pendingCreation,
-                TEST_USER.getIdentifier(), TEST_USER_HANDLES);
+                TEST_USER.getIdentifier(), TEST_USER_HANDLES, null);
 
         for (FabricatedOverlay overlay : pendingCreation) {
             verify(mTransactionBuilder).registerFabricatedOverlay(eq(overlay));
@@ -253,7 +253,7 @@
         categoryToPackage.remove(OVERLAY_CATEGORY_ICON_ANDROID);
 
         mManager.applyCurrentUserOverlays(categoryToPackage, null, TEST_USER.getIdentifier(),
-                TEST_USER_HANDLES);
+                TEST_USER_HANDLES, null);
 
         for (OverlayIdentifier overlayPackage : categoryToPackage.values()) {
             verify(mTransactionBuilder).setEnabled(eq(overlayPackage), eq(true),
@@ -270,7 +270,7 @@
     @Test
     public void zeroCategoriesSpecified_allDisabled() {
         mManager.applyCurrentUserOverlays(Maps.newArrayMap(), null, TEST_USER.getIdentifier(),
-                TEST_USER_HANDLES);
+                TEST_USER_HANDLES, null);
 
         for (String category : THEME_CATEGORIES) {
             verify(mTransactionBuilder).setEnabled(
@@ -285,7 +285,7 @@
         categoryToPackage.put("blah.category", new OverlayIdentifier("com.example.blah.category"));
 
         mManager.applyCurrentUserOverlays(categoryToPackage, null, TEST_USER.getIdentifier(),
-                TEST_USER_HANDLES);
+                TEST_USER_HANDLES, null);
 
         verify(mTransactionBuilder, never()).setEnabled(
                 eq(new OverlayIdentifier("com.example.blah.category")), eq(false),
diff --git a/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayControllerTest.java
index c454b45..8858f0f 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/theme/ThemeOverlayControllerTest.java
@@ -36,6 +36,7 @@
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.Mockito.when;
 
+import android.app.ActivityManager;
 import android.app.UiModeManager;
 import android.app.WallpaperColors;
 import android.app.WallpaperManager;
@@ -120,6 +121,8 @@
     private WakefulnessLifecycle mWakefulnessLifecycle;
     @Mock
     private UiModeManager mUiModeManager;
+    @Mock
+    private ActivityManager mActivityManager;
     @Captor
     private ArgumentCaptor<BroadcastReceiver> mBroadcastReceiver;
     @Captor
@@ -154,7 +157,7 @@
                 mBroadcastDispatcher, mBgHandler, mMainExecutor, mBgExecutor, mThemeOverlayApplier,
                 mSecureSettings, mWallpaperManager, mUserManager, mDeviceProvisionedController,
                 mUserTracker, mDumpManager, mFeatureFlags, mResources, mWakefulnessLifecycle,
-                mUiModeManager) {
+                mUiModeManager, mActivityManager) {
             @VisibleForTesting
             protected boolean isNightMode() {
                 return false;
@@ -206,7 +209,7 @@
                 ArgumentCaptor.forClass(Map.class);
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any(), any());
 
         // Assert that we received the colors that we were expecting
         assertThat(themeOverlays.getValue().get(OVERLAY_CATEGORY_SYSTEM_PALETTE))
@@ -231,7 +234,7 @@
         mBroadcastReceiver.getValue().onReceive(null, intent);
         mColorsListener.getValue().onColorsChanged(new WallpaperColors(Color.valueOf(Color.BLACK),
                 null, null), WallpaperManager.FLAG_SYSTEM, USER_SYSTEM);
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -245,7 +248,7 @@
                 ArgumentCaptor.forClass(Map.class);
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any(), any());
 
         // Should not change theme after changing wallpapers, if intent doesn't have
         // WallpaperManager.EXTRA_FROM_FOREGROUND_APP set to true.
@@ -254,7 +257,7 @@
         mColorsListener.getValue().onColorsChanged(new WallpaperColors(Color.valueOf(Color.BLACK),
                 null, null), WallpaperManager.FLAG_SYSTEM, USER_SYSTEM);
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -276,7 +279,7 @@
                 ArgumentCaptor.forClass(Map.class);
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any(), any());
 
         // Assert that we received the colors that we were expecting
         assertThat(themeOverlays.getValue().get(OVERLAY_CATEGORY_SYSTEM_PALETTE))
@@ -315,7 +318,7 @@
                 .isFalse();
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -350,7 +353,7 @@
                 "android.theme.customization.color_both\":\"0")).isTrue();
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -405,7 +408,7 @@
         assertThat(updatedSetting.getValue().contains(
                 "android.theme.customization.color_both\":\"1")).isTrue();
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -474,7 +477,7 @@
                 "android.theme.customization.color_both\":\"1")).isTrue();
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -505,7 +508,7 @@
         assertThat(updatedSetting.getValue().contains("android.theme.customization.color_index"))
                 .isFalse();
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -536,7 +539,7 @@
         assertThat(updatedSetting.getValue().contains("android.theme.customization.color_index"))
                 .isFalse();
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -569,7 +572,7 @@
                 anyInt());
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -602,7 +605,7 @@
                 eq(Settings.Secure.THEME_CUSTOMIZATION_OVERLAY_PACKAGES), updatedSetting.capture());
 
         // Apply overlay by existing theme from secure setting
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -635,7 +638,7 @@
 
 
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -657,7 +660,7 @@
         ArgumentCaptor<Map<String, OverlayIdentifier>> themeOverlays =
                 ArgumentCaptor.forClass(Map.class);
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any(), any());
 
         // Assert that we received secondary user colors
         assertThat(themeOverlays.getValue().get(OVERLAY_CATEGORY_SYSTEM_PALETTE))
@@ -670,7 +673,7 @@
     public void onProfileAdded_setsTheme() {
         mBroadcastReceiver.getValue().onReceive(null,
                 new Intent(Intent.ACTION_MANAGED_PROFILE_ADDED));
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -680,7 +683,7 @@
         mBroadcastReceiver.getValue().onReceive(null,
                 new Intent(Intent.ACTION_MANAGED_PROFILE_ADDED));
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -690,7 +693,7 @@
         mBroadcastReceiver.getValue().onReceive(null,
                 new Intent(Intent.ACTION_MANAGED_PROFILE_ADDED));
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -703,7 +706,7 @@
         mColorsListener.getValue().onColorsChanged(mainColors, WallpaperManager.FLAG_SYSTEM,
                 USER_SYSTEM);
 
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
 
         // Regression test: null events should not reset the internal state and allow colors to be
         // applied again.
@@ -713,11 +716,11 @@
         mBroadcastReceiver.getValue().onReceive(null, intent);
         mColorsListener.getValue().onColorsChanged(null, WallpaperManager.FLAG_SYSTEM, USER_SYSTEM);
         verify(mThemeOverlayApplier, never()).applyCurrentUserOverlays(any(), any(), anyInt(),
-                any());
+                any(), any());
         mColorsListener.getValue().onColorsChanged(new WallpaperColors(Color.valueOf(Color.GREEN),
                 null, null), WallpaperManager.FLAG_SYSTEM, USER_SYSTEM);
         verify(mThemeOverlayApplier, never()).applyCurrentUserOverlays(any(), any(), anyInt(),
-                any());
+                any(), any());
     }
 
     @Test
@@ -736,7 +739,7 @@
                 mBroadcastDispatcher, mBgHandler, executor, executor, mThemeOverlayApplier,
                 mSecureSettings, mWallpaperManager, mUserManager, mDeviceProvisionedController,
                 mUserTracker, mDumpManager, mFeatureFlags, mResources, mWakefulnessLifecycle,
-                mUiModeManager) {
+                mUiModeManager, mActivityManager) {
             @VisibleForTesting
             protected boolean isNightMode() {
                 return false;
@@ -757,7 +760,7 @@
         verify(mDeviceProvisionedController).addCallback(mDeviceProvisionedListener.capture());
 
         // Colors were applied during controller initialization.
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
         clearInvocations(mThemeOverlayApplier);
     }
 
@@ -776,7 +779,7 @@
                 mBroadcastDispatcher, mBgHandler, executor, executor, mThemeOverlayApplier,
                 mSecureSettings, mWallpaperManager, mUserManager, mDeviceProvisionedController,
                 mUserTracker, mDumpManager, mFeatureFlags, mResources, mWakefulnessLifecycle,
-                mUiModeManager) {
+                mUiModeManager, mActivityManager) {
             @VisibleForTesting
             protected boolean isNightMode() {
                 return false;
@@ -797,7 +800,7 @@
         verify(mDeviceProvisionedController).addCallback(mDeviceProvisionedListener.capture());
 
         // Colors were applied during controller initialization.
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
         clearInvocations(mThemeOverlayApplier);
 
         WallpaperColors mainColors = new WallpaperColors(Color.valueOf(Color.RED),
@@ -819,12 +822,12 @@
 
         // Defers event because we already have initial colors.
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
 
         // Then event happens after setup phase is over.
         when(mDeviceProvisionedController.isCurrentUserSetup()).thenReturn(true);
         mDeviceProvisionedListener.getValue().onUserSetupChanged();
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -847,11 +850,11 @@
         mColorsListener.getValue().onColorsChanged(mainColors, WallpaperManager.FLAG_SYSTEM,
                 USER_SYSTEM);
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
 
         mWakefulnessLifecycle.dispatchFinishedGoingToSleep();
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -873,10 +876,10 @@
         mColorsListener.getValue().onColorsChanged(mainColors, WallpaperManager.FLAG_SYSTEM,
                 USER_SYSTEM);
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
 
         mWakefulnessLifecycleObserver.getValue().onFinishedGoingToSleep();
-        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any());
+        verify(mThemeOverlayApplier).applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
     }
 
     @Test
@@ -896,7 +899,7 @@
                 ArgumentCaptor.forClass(Map.class);
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(themeOverlays.capture(), any(), anyInt(), any(), any());
 
         // Assert that we received the colors that we were expecting
         assertThat(themeOverlays.getValue().get(OVERLAY_CATEGORY_SYSTEM_PALETTE))
@@ -915,19 +918,19 @@
         mColorsListener.getValue().onColorsChanged(startingColors, WallpaperManager.FLAG_SYSTEM,
                 USER_SYSTEM);
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
         clearInvocations(mThemeOverlayApplier);
 
         // Set to the same colors.
         mColorsListener.getValue().onColorsChanged(sameColors, WallpaperManager.FLAG_SYSTEM,
                 USER_SYSTEM);
         verify(mThemeOverlayApplier, never())
-                .applyCurrentUserOverlays(any(), any(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), any(), anyInt(), any(), any());
 
         // Verify that no change resulted.
         mWakefulnessLifecycleObserver.getValue().onFinishedGoingToSleep();
         verify(mThemeOverlayApplier, never()).applyCurrentUserOverlays(any(), any(), anyInt(),
-                any());
+                any(), any());
     }
 
     @Test
@@ -941,7 +944,7 @@
                 ArgumentCaptor.forClass(FabricatedOverlay[].class);
 
         verify(mThemeOverlayApplier)
-                .applyCurrentUserOverlays(any(), themeOverlays.capture(), anyInt(), any());
+                .applyCurrentUserOverlays(any(), themeOverlays.capture(), anyInt(), any(), any());
 
         FabricatedOverlay[] overlays = themeOverlays.getValue();
         FabricatedOverlay accents = overlays[0];
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 4dad2d5..ec80445 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -513,6 +513,7 @@
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
@@ -910,6 +911,16 @@
     @GuardedBy("this")
     final ComponentAliasResolver mComponentAliasResolver;
 
+    private static final long HOME_LAUNCH_TIMEOUT_MS = 15000;
+    private final AtomicBoolean mHasHomeDelay = new AtomicBoolean(false);
+
+    /**
+     * Tracks all users with computed color resources by ThemeOverlaycvontroller
+     */
+    @GuardedBy("this")
+    private final Set<Integer> mThemeOverlayReadyUsers = new HashSet<>();
+
+
     /**
      * Tracks association information for a particular package along with debuggability.
      * <p> Associations for a package A are allowed to package B if B is part of the
@@ -2269,6 +2280,7 @@
                 mService.startBroadcastObservers();
             } else if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) {
                 mService.mPackageWatchdog.onPackagesReady();
+                mService.scheduleHomeTimeout();
             }
         }
 
@@ -5235,6 +5247,61 @@
         }
     }
 
+    /**
+     * Starts Home if there is no completion signal from ThemeOverlayController
+     */
+    private void scheduleHomeTimeout() {
+        if (mHasHomeDelay.compareAndSet(false, true)) {
+            int userId = mUserController.getCurrentUserId();
+            mHandler.postDelayed(() -> {
+                if (!isThemeOverlayReady(userId)) {
+                    Slog.d(TAG,
+                            "ThemeHomeDelay: ThemeOverlayController not responding, launching "
+                                    + "Home after "
+                                    + HOME_LAUNCH_TIMEOUT_MS + "ms");
+                    setThemeOverlayReady(userId);
+                }
+            }, HOME_LAUNCH_TIMEOUT_MS);
+        }
+    }
+
+    /**
+     * Used by ThemeOverlayController to notify when color
+     * palette is ready.
+     *
+     * @param userId The ID of the user where ThemeOverlayController is ready.
+     *
+     * @throws RemoteException
+     *
+     * @hide
+     */
+    @Override
+    public void setThemeOverlayReady(@UserIdInt int userId) {
+        enforceCallingPermission(Manifest.permission.SET_THEME_OVERLAY_CONTROLLER_READY,
+                "setThemeOverlayReady");
+
+        boolean updateUser;
+        synchronized (mThemeOverlayReadyUsers) {
+            updateUser = mThemeOverlayReadyUsers.add(userId);
+        }
+
+        if (updateUser) {
+            mAtmInternal.startHomeOnAllDisplays(userId, "setThemeOverlayReady");
+        }
+    }
+
+    /**
+     * Returns current state of ThemeOverlayController color
+     * palette readiness.
+     *
+     * @hide
+     */
+    public boolean isThemeOverlayReady(int userId) {
+        synchronized (mThemeOverlayReadyUsers) {
+            return mThemeOverlayReadyUsers.contains(userId);
+        }
+    }
+
     final void ensureBootCompleted() {
         boolean booting;
         boolean enableScreen;
@@ -17612,6 +17679,10 @@
             mAtmInternal.onUserStopped(userId);
             // Clean up various services by removing the user
             mBatteryStatsService.onUserRemoved(userId);
+
+            synchronized (mThemeOverlayReadyUsers) {
+                mThemeOverlayReadyUsers.remove(userId);
+            }
         }
 
         @Override
@@ -18966,6 +19037,11 @@
             return ActivityManagerService.this.clearApplicationUserData(packageName, keepState,
                     isRestore, observer, userId);
         }
+
+        @Override
+        public boolean isThemeOverlayReady(int userId) {
+            return ActivityManagerService.this.isThemeOverlayReady(userId);
+        }
     }
 
     long inputDispatchingTimedOut(int pid, final boolean aboveSystem, TimeoutRecord timeoutRecord) {
diff --git a/services/core/java/com/android/server/wm/RootWindowContainer.java b/services/core/java/com/android/server/wm/RootWindowContainer.java
index d4fdc12..29db204 100644
--- a/services/core/java/com/android/server/wm/RootWindowContainer.java
+++ b/services/core/java/com/android/server/wm/RootWindowContainer.java
@@ -1452,6 +1452,11 @@
             return false;
         }
 
+        if (!mService.mAmInternal.isThemeOverlayReady(userId)) {
+            Slog.d(TAG, "ThemeHomeDelay: Home launch was deferred.");
+            return false;
+        }
+
         // Updates the home component of the intent.
         homeIntent.setComponent(new ComponentName(aInfo.applicationInfo.packageName, aInfo.name));
         homeIntent.setFlags(homeIntent.getFlags() | FLAG_ACTIVITY_NEW_TASK);
diff --git a/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java b/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
index 7edfd9a..0f765a7 100644
--- a/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
+++ b/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
@@ -311,6 +311,7 @@
         doReturn(true).when(amInternal).hasStartedUserState(anyInt());
         doReturn(false).when(amInternal).shouldConfirmCredentials(anyInt());
         doReturn(false).when(amInternal).isActivityStartsLoggingEnabled();
+        doReturn(true).when(amInternal).isThemeOverlayReady(anyInt());
         LocalServices.addService(ActivityManagerInternal.class, amInternal);
 
         final ActivityManagerService amService =