There are several methods suggested to discover your skin undertone. One of the most commonly used by professionals and one of the easiest, quickest, and most effective for you is undoubtedly:

During the day, in natural light, preferably near a window or outside, observe the inside of your wrist and check the color of your veins:

• If they are green or brownish, your undertone is warm.
• If they are blue or purplish, your undertone is cool.
• If they are both blue and green, your undertone is neutral.

There are other ways to find out your undertone, such as:

Sun reaction of your skin. Think about how your skin looks after a day at the beach. If you tan easily and rarely burn, your undertone is warm. If you tend to redden and rarely or hardly tan, it’s cool. If neither is the case, it’s neutral. Golden or silver? If golden tones suit you better and silver tones do nothing for you, you have a warm undertone. If you look more radiant in silver tones but less so in gold tones, you’re cool. If both work well, you’re neutral. Contrast with white. Hold a sheet of white paper near your face and observe your skin in natural light. If your skin appears yellowish or pale, it’s warm. If it looks pink or reddish, it’s cool. If it appears grayish or you can’t determine any shade, it’s neutral.

Professional makeup artists use this terminology extensively. Indeed, if you’re a makeup enthusiast, this is probably not new to you.

By knowing your skin undertone, you’ll be better able to determine which colors are most flattering for you.