I've heard that it's pretty difficult to match foundation makeup colours to skin tones. I also know that hardware stores have nifty machines that take a colour sample and mix up paint to match that colour exactly. Someone connect the dots here, please.
Mokalus of Borg
PS - Of course, you'd need to pretty up the process to sell it for makeup.
PPS - Few people want the implication that their skin is so weird that it takes industrial paint equipment to match it.