Now playing color source for the widget background

Feature description:

I quite like the “Now playing color source” feature for theming my app.
Unless I’m missing something I don’t think I can apply this to the widget background

Would it be possible to implement something comparable for changing the background color of the widget?
Or even better, use the color from the album cover as the the whole app theme (also including the background color for settings and the like)

Problem solved:

The widget color isn’t dynamic

Brought benefits:

More theming potential for the widget

Other application solutions:

 
I am currently using Musicolet for local playback, see attached images for their widget
 

Additional description and context:

 

 

Screenshots / Mockup: