I have four of the skin enhancers, which i bought at the Makeup Show L.A.
-SX02 - an ultra fair pinkish neutral tone
-SX09 - a light salmon color
-SX12 - a medium yellow tone / caramel
-SX16 - a warm chocolate color
Basically i picked the colors from very fair to pretty dark and a mix of yellows and pinks in order to be able to mix and match (hopefully) almost every skin tone.
Hope that helps!
The shades above and I would also like to recommend SX07. If you can, try to look at them in person. I believe you can find them at Nordstrom.