Undertone is the hue that shows through your skin. There are three predominant undertones: Warm, Cool and Neutral Warm Undertones Tend to lean yellow or golden. Your skin tans easily. Gold jewelry looks great on you. The veins on your wrist can look more green than blue. Cool Undertones Tend to have pink or blue. Your skin burns easily. Silver jewelry looks great on you. The veins on your wrist can look more blue than green. Neutral Undertones An absence of both warm and cool. Your skin could burn or tan. Gold or silver flatters well. Determining your undertone is not an exact science - it is a starting point. Sometimes there is no clear cut answer and it is possible to match to a shade that has a different undertone than you.