[Feature Request] Customize widget color on Android

[Anachrion]

Hi there : )
I wanted to know if it would be possible to add a better color picker, like for exemple dark blue. Currently, only bright color are available through the chromatic wheel. If I could just copy paster a hew value into a field I would be happy.

Also woud it be possible de customize the card backgroud also ? By default, it corresponds to the android material color, and it might not match the picked background color for the widget : (

Anyway, thanks for the app, love it so far !
Best regards : )