Colour of your veins – This is the easiest way to determine your skin undertone. Closely inspect the insides of your wrists. If they appear green, you have a warm undertone. If they appear blue, your skin undertone is cool. And if you can see a mix of both blue and green veins, you have a neutral undertone.
Colour of your eyes – Another way to determine your skin undertone is by paying attention to your eye colour. Blue, green, grey and deep brown eyes have characteristics of a cool undertone. Green, amber or hazel eyes with golden flecks have a warm skin undertone.