On the subject of Human(oid) skins

Since my previous posting seems to have become a bit of a “soapbox” and was not actually answered.

What is the proper way to describe different skin tones??

as an example if the base tone for a skin is (rgb hex) AC8063 how would you describe it??

Im looking to create a set of skins covering the full range of human skin tones and i need help in choosing 2 highlight colors and then 2 shadow colors for each “base tone”. Does anybody want to take a stab at doing this?? ( i also need somebody to help with creating a reference grey skin).