OH MY GOLLY BRO this is spectacular

I think either a white with some color accents or a brown with another color gradient could be fitting?

switch out the top for a blue/purple grey & make it darker first to match the wings. the reason why you can't think of a hair color is because the wings are conflicting with the top's color

yellow/warm color hair should be fine afterward

Give it black hair but with a tint of navy blue
Or make it ginger