Like Andrei, I used flesh with the slightest bit of red added (Mussini-Schminke oils, but I don't recall the specific labels, I'll have to check). Look around at people you see, and in different kinds of light, you'll see there's not one consistent color. Andrei's point about scale is a good one, too.
As long as you're doing faces, here's a tip--you can reproduce five o'clock shadow, too, with flesh and a little bit of dark blue added.