Undertone decides which nail colors work for your skin tone, not depth, and you can find yours in under a minute. Check the veins on your inner wrist in natural light: green means warm, blue or purple means cool, and a mix of both means neutral. That single answer filters every shade recommendation that follows.
Most guides treat skin tone (how light or deep your skin looks) and undertone (the fixed hue beneath it) as the same thing, which is why "fair skin" advice can feel right for one fair-skinned reader and wrong for another. Nail colors for your skin tone only work as a system once undertone is the first filter, not skin depth.


