How do y’all get good shadows for skin?

Hey all,

Not sure if this is the best place for this so lmk if not. I’ve looked at YouTube videos for how to mix colors to make skin tones, but I just could not place the color of the shadow of this reference (last pic is my horrible attempt. Egads, I know, I know.)

Any advice for how I could improve in understanding the color of skin shadows? And then actually replicate it in paint?

I’m using mainly Windsor and newton gouache and I have the following colors: - Primaries - Alizarin Crimson - Burnt Umber - Prussian & Ultramarine Blue - Yellow Ochre - Zinc white - Permanent Green middle

Thanks in advance!