This is a step by step on how I get accurate skin colors to what I'm painting. 

Along with every other lesson in the course, I recommend you do this with me.

I am using a limited palette but don't be fooled on how difficult this might be. Most of good color mixing is just pure trial and error until it feels right compared to the reference. It's subjective, but it's important that you do mix a color for each different family talked about in the lesson.