But your answer doesn't count because you're not an expert

There are, at a minimum 4 colors: brown, orange, off white and black (plus shades off of them).

I would say over 90% are single color. Maybe 7 to 8% are 2-color, 1% to 2% are 3-color and the partridge (quail?) is 4 or more colors.

I didn't think anyone would come up with the answer. What did it take, 5 minutes. Oh well.