Color Zones

I did a quick study to remind myself of the color zones of the face, as well as document it for my readers. The 'base skin tone' layer and 'subdermal color zone' layer were combined using an Overlay blending mode (and a fair amount of hue/sat adjustment on the color zone layer to make it mesh nicely). The skin on the right hand side was the result. 

Don't assume this is all there is to skin color, though! The result on the right is still missing crucial aspects like ambient lighting, highlights, shadows, and blemishes. This is just the first step away from flat, cell-shaded, one-color skin.