New comment by obunden on void-packages repository

https://github.com/void-linux/void-packages/issues/15294#issuecomment-541288867

Comment:
Ok, probably some quirk with the hardware/driver. I don't have wayland/musl and I'm on nvidia proprietary drivers so can't really test it further. I read that --vf=format=rgba might fix colors in mpv, other than that I don't know what more can be done. Hope you find a solution that works for you.