BlueJaye,
I have to second Randim's recommendation. Finding the correct shade of foundation is extremely important, but it is very difficult match without actually putting product on your face. Going to a makeup consultant at any department store makeup counter will yield the absolute best results and get you matched most effectively.
There is an old trick for finding the correct shade. Spread a tiny amount of foundation on the inside of your wrist. When you find a shade that is indistinguishable from your natural skin tone, it should work on your face.
Hugs,
Sally