Turn over your wrist and take a look at your veins. If they look blue, you are most likely a "cool" undertone. If they appear on the greenish side, then you are probably "warm." If you notice a mix of blue and green, chances are you are "neutral"
Now that you have an idea of what your undertone is, you are all ready to make your choice. Follow my lipstick guide below to help you on your hunt.