Skin color is a relatively minor component of race, race describes the clustering of a whole host of traits and characteristics in a group of individuals.
Yellow-skinned Africans would still be Africans, purple-skinned Asians would still be Asians, and green-skinned Europeans would still be Europeans.
Yellow-skinned Africans would still be Africans, purple-skinned Asians would still be Asians, and green-skinned Europeans would still be Europeans.