Theming: splashscreen uses dark background color.

src/main/res/drawable/splashscreen.xml

@@ -3,8 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:opacity="opaque">
 
-    <!--    TODO DayNight: set background color for dayNight -->
+    <item android:drawable="@color/splashscreen_background" />
-    <item android:drawable="@android:color/background_dark" />
 
     <item
         android:width="300dp"

src/main/res/values/colors.xml

@@ -36,4 +36,6 @@ limitations under the License.
     <color name="text_gradient_end">#00000000</color> <!-- black 0% opacity -->
     <color name="text_gradient_start">#FF000000</color> <!-- black 100% opacity -->
     <color name="track_controller_background">#FF0E0E0E</color> <!-- dark gray -->
+
+    <color name="splashscreen_background">#272727</color>
 </resources>

src/main/res/values/themes_custom.xml

@@ -51,7 +51,8 @@ limitations under the License.
     </style>
 
     <style name="SplashTheme" parent="ThemeCustom">
+        <item name="android:statusBarColor">@color/splashscreen_background</item>
+        <item name="android:navigationBarColor">@color/splashscreen_background</item>
         <item name="android:windowBackground">@drawable/splashscreen</item>
-        <item name="android:windowFullscreen">true</item>
     </style>
 </resources>