There are a few different ways to determine skin tone. The first is to flip the wrist over and look at the veins there. If the veins appear blue, the skin tone is cool. If they have a greenish tinge, the skin tone is warm. Another option is to hold a white towel or t-shirt underneath the face; if the face reflects yellow, it is a warm skin tone, and if the face appears blue, it is a cool skin tone. Finally, people with cooler skin tones may have lighter eyes than those with warmer skin tones, but this is not always the case.
Beauty Secrets of The World