How do I determine my skin undertone, you ask. Well, take a look at your veins on your wrist. What color are they? If they appear greenish, you have a warm undertone. If they appear purple or blue, you have a cool undertone. And if you cannot tell if they are blue or green, you have a neutral undertone. Whether your skin undertone is warm, cool, or neutral determines which color of lipstick you wear. Lipsticks with warm undertones go well with warm skin undertones. These lipsticks usually have peachy, orangy, and reddish undertones.
Therefore, brown, peachy pink and coral lipstick colors are perfect for warm skin undertones. Lipsticks with blue, green, and purple undertones look great on cooler skin undertones. Thus, pink, beige, dark brown, and deep plum would be ideal for these undertones. Neutral undertones look good with both warm and cool lipstick shades.