The highest melanin content is found in black people, whose hair and body are dark brown or blackish in color. In contrast, Caucasians have the least amount of melanin.
Caucasians' hair ranges from black to gold to gray. Gray hairs look like a furrow, but this is due to the lack of melanin and is not a furrow.
Yellow people have about the same amount of melanin as blacks and whites. The moderate amount of melanin results in a body color between yellow and dark brown and hair color between black and dark dark brown.