I am fine either way so I would like to get some feedback from @jan first plus I would need the graphic work as in the svg file to generate the artifacts.
That would be a new feature and yes that should be technically possible even though I am not sure how much work this would be at this time since the code base isn’t perfect for multi theme support. We might also rather look into the new feature of Android day/night theme 
But again this would then also need some input from @jan and the design team on how the dark theme should look like.