Having a solid color theory, skin types, tones, textures & color selection understanding is extremely important in permanent makeup, and you will need it if you plan to provide corrective services and in some cases, correct our own work. Unfortunately, having a great technique and knowing how to adequately shape your clients eyebrows are simply not enough. You must also know and understand the colors that your are working with as well as the skin you will be  implanting the color in to.