Theming UI enhancements

I have a couple of ideas for UI theming:

1) Material You theme selection should include an option to have a 'light' main screen instead of the dark it defaults to. I'm guessing it's taken from the overall display setting on the device. 

2) Selecting a colored theme, for example, Tangerine, should keep the navigation bar that same color instead of black. It lends to a nicer aesthetic and is similar to Material You theming.