Here are some process shots of a self-portrait, and I figured this is a good example of using hue shifts on the face. Here's an exaggerated diagram showing how the colors change over the face area:

Here are some color samples from the painting, showing how you could apply this more practically:

There are often greens in the beard area as well as blues, and very often you can just use a desaturated skin color to act as blue, instead of a literal blue.
By the way, subsurface scattering colors are most often fully saturated orange/reds, so don't be afraid to go wild there.
Hope this was useful!
Ognjen Sporin
2021-11-25 07:08:18 +0000 UTCLiquortalk .
2021-11-23 19:58:07 +0000 UTC