QUICK TIP: Don't know your undertone, trying to find the right match? Just flip over your forearm and look closely at your veins, do they turn out green or blue? If they're green (mine are) it means you are yellow/warm-toned, and if its blue, then you're a pink/cool tone. Its useful if you're thinking whether you're an NC (warm toned) or NW (cool toned). xx Roseanne