Task color (color of bar in recents entry) will match the palette color of the artist/album detail, now playing, and tag editor activities.

app/src/main/java/com/kabouzeid/gramophone/ui/activities/AlbumDetailActivity.java

@@ -207,6 +207,7 @@ public class AlbumDetailActivity extends AbsFabActivity implements PaletteColorH
                     toolbarColor = swatch.getRgb();
                     albumTitleView.setBackgroundColor(toolbarColor);
                     albumTitleView.setTextColor(swatch.getTitleTextColor());
+                    notifyTaskColorChange(toolbarColor);
                     if (Util.hasLollipopSDK() && PreferenceUtils.getInstance(AlbumDetailActivity.this).coloredNavigationBarAlbumEnabled())
                         getWindow().setNavigationBarColor(toolbarColor);
                 }
@@ -214,6 +215,11 @@ public class AlbumDetailActivity extends AbsFabActivity implements PaletteColorH
         });
     }
 
+    @Override
+    protected boolean overrideTaskColor() {
+        return true;
+    }
+
     @Override
     public int getPaletteColor() {
         return toolbarColor;

app/src/main/java/com/kabouzeid/gramophone/ui/activities/ArtistDetailActivity.java

@@ -302,6 +302,7 @@ public class ArtistDetailActivity extends AbsFabActivity implements PaletteColor
                     toolbarColor = swatch.getRgb();
                     artistNameTv.setBackgroundColor(swatch.getRgb());
                     artistNameTv.setTextColor(swatch.getTitleTextColor());
+                    notifyTaskColorChange(toolbarColor);
                     if (Util.hasLollipopSDK() && PreferenceUtils.getInstance(ArtistDetailActivity.this).coloredNavigationBarArtistEnabled())
                         getWindow().setNavigationBarColor(swatch.getRgb());
                 } else {
@@ -311,6 +312,11 @@ public class ArtistDetailActivity extends AbsFabActivity implements PaletteColor
         });
     }
 
+    @Override
+    protected boolean overrideTaskColor() {
+        return true;
+    }
+
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);

app/src/main/java/com/kabouzeid/gramophone/ui/activities/MusicControllerActivity.java

@@ -288,6 +288,11 @@ public class MusicControllerActivity extends AbsFabActivity {
         songArtist.setText(song.artistName);
     }
 
+    @Override
+    protected boolean overrideTaskColor() {
+        return true;
+    }
+
     private void setUpAlbumArtAndApplyPalette() {
         albumArt.post(new Runnable() {
             @Override
@@ -323,6 +328,7 @@ public class MusicControllerActivity extends AbsFabActivity {
                     animateColorChange(swatch.getRgb());
                     songTitle.setTextColor(swatch.getTitleTextColor());
                     songArtist.setTextColor(swatch.getBodyTextColor());
+                    notifyTaskColorChange(swatch.getRgb());
                 } else {
                     resetColors();
                 }

app/src/main/java/com/kabouzeid/gramophone/ui/activities/base/ThemeBaseActivity.java

@@ -66,12 +66,22 @@ public abstract class ThemeBaseActivity extends ActionBarActivity implements Kab
         // Dark theme
         ThemeSingleton.get().darkTheme = PreferenceUtils.getInstance(this).getGeneralTheme() == R.style.Theme_MaterialMusic;
 
+        if (!overrideTaskColor()) {
+            notifyTaskColorChange(PreferenceUtils.getInstance(this).getThemeColorPrimary());
+        }
+    }
+
+    protected boolean overrideTaskColor() {
+        return false;
+    }
+
+    protected void notifyTaskColorChange(int color) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             // Sets color of entry in the system recents page
             ActivityManager.TaskDescription td = new ActivityManager.TaskDescription(
                     getString(R.string.app_name),
                     BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher),
-                    PreferenceUtils.getInstance(this).getThemeColorPrimary());
+                    color);
             setTaskDescription(td);
         }
     }

app/src/main/java/com/kabouzeid/gramophone/ui/activities/tageditor/AbsTagEditorActivity.java

@@ -290,12 +290,14 @@ public abstract class AbsTagEditorActivity extends AbsBaseActivity {
     private void applyPalette(final Bitmap bitmap) {
         if (bitmap != null) {
             Palette.generateAsync(bitmap, new Palette.PaletteAsyncListener() {
+                @TargetApi(Build.VERSION_CODES.LOLLIPOP)
                 @Override
                 public void onGenerated(Palette palette) {
                     final int vibrantColor = palette.getVibrantColor(DialogUtils.resolveColor(AbsTagEditorActivity.this, R.attr.default_bar_color));
                     paletteColorPrimary = vibrantColor;
                     observableScrollViewCallbacks.onScrollChanged(scrollView.getCurrentScrollY(), false, false);
                     setStatusBarColor(ColorChooserDialog.shiftColorDown(vibrantColor), false);
+                    notifyTaskColorChange(paletteColorPrimary);
                     if (Util.hasLollipopSDK() && PreferenceUtils.getInstance(AbsTagEditorActivity.this).coloredNavigationBarTagEditorEnabled())
                         getWindow().setNavigationBarColor(vibrantColor);
                 }
@@ -305,6 +307,11 @@ public abstract class AbsTagEditorActivity extends AbsBaseActivity {
         }
     }
 
+    @Override
+    protected boolean overrideTaskColor() {
+        return true;
+    }
+
     protected void writeValuesToFiles(final Map<FieldKey, String> fieldKeyValueMap) {
         writeValuesToFiles(fieldKeyValueMap, null, false);
     }