"Skin color" and "skin tone" sometime seem to be used interchangeably and sometimes not. Do they mean the same thing, i.e., do they both mean literally color (= % of magenta vs yellow etc.) PLUS how light or dark the skin is? Or are they two different things, i.e. skin color the magenta/yellow, etc. blend and skin tone how light or dark?"Skin color" and "skin tone" sometime seem to b