I have a young rooster that was sold to me as a black with a black hen. The hen looks 100% black with greenish sheen, but the rooster seems to have reddish tints in his neck hackles. The rest of his body is black, black withthe greenish sheen like the hen and the black australorp I had had. The neck hackles aren't obvious, but if you look closely, they do have the reddish tone. Is black a pure color, or does the tint of red mean there is another color type acting there?