In order to find your foundation shade, first, you must figure out whether you have warm, cool, or neutral undertones. If you have greenish veins, you have a warm undertone, blueish veins have cool undertones, and if you have a mix of both you are a neutral undertone. You can also use jewelry to determine your undertone. If gold pops on your skin, you likely have a warm undertone, silver for cool undertones and if you can wear both, you are probably neutral. If testing in person, try a few shades along your jawline, and the one that disappears seamlessly into your skin is likely the best match. If you can't decide between two close shades, opt for the one that blends more naturally with your neck. If you are trying to identify your shade online, use our Foundation Shade Finder or Foundation Quiz.