I choose black because there are some situations where a painted head is better than a non-painted head. I've seen where it made little difference whether it was painted or not.
I feel the color of a painted head may be important with the size and type of jig. For example, a yellow marabou feather jig may work best with a white head. Since one of my favorite tube jigs is black and chartreuse, a painted black head seems to work best. Perhaps, that is because the black is already the head of the tube jig.

Anyway, I feel the color of the jig head may depend more on the jig/etc you are wanting to fish.

ineteresting.....I'll have to try orange with ?? jig.