Today, I bring you the famous skin tones palette developed by artist Daniel Greene.
I made two charts of the same palette. One using Flake White (top chart) and the other using Titanium White (bottom chart)

I made the charts to help me choose the kind of white for a given color. It is evident that flake white is the better one for skin tone mixtures because its warmer and does not shift the hue of a mixture towards blue like titanium does.

That is not to say that titanium white is bad for portraits. Titanium has it's uses and the chart shows that for the right light conditions.

Enjoy

Here is a closeup with a better lightening and camera setup

I have been experimenting with limited palettes for painting in oils. I have chosen a Rembrandt Oil paint brand of Yellow Ochre, Transparent Oxide Red, and Ivory Black in addition to Titanium White.

Here is what the color swatches of that limited palette came out with.

I'll do some landscape studies with it and post the result.