WHAT'S MY UNDERTONE?
If the veins on the underside of your wrist appear purple or blue, you are most likely have a cool undertone! Stick to cooler shades (shades with a blue undertone). Your perfect red lipstick? Try a red-purple berry tone.
If you find it hard to distinguish whether your veins are blue or green or purple, or maybe it is a blend of two, you are most likely neutral. This means a wide variety of colors will look great on you. From here, you can either lean more cool or more warm, which can be hard to decipher, but this will tell you what are the absolute best colors for you.
If the veins on the underside of your wrist appear green or olive, you most likely have a warm undertone! Stick to warmer shades (shades with a yellow or golden undertone). Your perfect red lipstick? Try a fiery red-orange.