In the past I was color matched for my shade range (medium) and undertone (warm or golden). With this basic knowledge (of what my shade range and undertone was, which happened to be medium tan sand), I was able to use the shade descriptions and numbers online at Tarte to figure out which shades would make good highlighter shades, skin matching shades and contour shades of the Shape Tape Concealer. This prevented me from ending up with colors that were too red or pink for my golden to neutral skin undertones. If you have an existing foundation product at home that works perfectly for you, I would recommend looking up online what the shade range and undertone is on that item in order to help you with a starting point on how to read and interpret the shade ranges and undertones here for Shape Tape concealer and even the foundation to best figure out what matches what you know works for you.