Every beginner stylist needs to learn color theory before they begin working on a client's hair.
Kristeena Van Cleave (@thatrebelstylist) shares a tutorial, so you can see color theory in action.
In the tutorial, Van Cleave transitions hair with a blue-green tone to blonde. Using a black and white filter to find the level and the color wheel, Van Cleave determined that she needed to make red-orange at the same level 10 to eliminate the blue-green.
To transition, Van Cleave used ShadesEQ gloss equal parts 10aa and pastel pink.
You can watch the tutorial below in a post Van Cleave shared to Instagram.