When I open the “More” tab in my Homey app for Android, I get that dark background. But my navigation bar, in the bottom of the screen, is still light gray. It seems to be unaware of the background-color, which might have something to do with the fact that the background is an image / gradient.
Is it possible to read the system settings and make the bar black if the user uses a dark theme? Or, to keep it simple, just make it black by default. A black bar will always look better on (AM)OLED screens.
Nicest solution would be if it had the same behaviour as the notification bar, which is just completely transparent. Then it will have that nice colorfull background too.