Picking a foundation can be a frustrating adventure if you aren’t completely sure of your undertone. Cool complexions are more pink based while warm complexions are more yellow based. The undertone of your skin has nothing to do with its shade — just because you have fair skin doesn’t mean you have cool undertones and darker skin isn’t always warm. There are a few different ways to determine if you are warm or cool but here are the basics:
THE FABRIC TEST: In good lighting (preferably daylight) take a peice of yellow fabric and hold it next to your face, and do the same with a peice of red fabric. Which color is more flattering to your skin? If it’s red then your are cool toned, and if the yellow looks best you are warm.
It is best to determine your undertone by looking at the skin on your body rather than your face — because of facial redness, sometimes it seems like you have pink undertones when in reality you are yellow toned.
If you are interested in getting a MAC foundation please check out this POST because their naming system concerning cool/warm is quite different!