Value study

Today I did some reading about colors, skintones, color temperature and all that sort of stuff. A lot to think about, and I realised a few things I was doing wrong, which is good.

Didn't have time to play around with it but I did a quick values study, since getting the values right is just as important (or even more, I guess).

On the left is my attempt (in 5 tones), on the right is the reference image, and a posterised version of it in the corner. As you can see, I didn't do TOO badly, but I didn't use my highlight color enough, and the shadow-covered eye I kept too bright (which I knew I was doing but even after adjusting I guess I didn't do enough).