Balayage is a hair coloring technique which is designed to create very natural-looking highlights and colors. When doing Balayage, no foils are used. Instead of the use of foils, the hair color and/or highlight colors are skillfully placed onto the chosen hair strands using hands and sometimes a hair color brush and a wooden paddle to help the Colorist paint the colors onto the hair. А что вам не ясно про разные цвета? Очевидно, не в один.