In my opinion what sells skin is depth. You can build up to pale skin from just about any base. Grey, red brown, orange, beige, pink, purple. All depending on the effect you want.
I find that the lightest color(s) should be reserved for select standout parts such as the nose, cheeks, brow and chin, and that while you want darker shades on the rest of skin and of course recesses as the darkest parts, it's good to glaze your entire base paints even in those recesses to tone them down and tint them to more closely match your intended main color. That way you'll get both depth and definition, but also avoid the darker colors drawing attention away from the lighter ones.
NSFW example of Pallid Wych Flesh on a purple base. Spoiler tags because naked girls: