Christophe Robin Shade Variation Care are the perfect masks for colored hair! Tinted slightly with temporary hair color, these masks work to re-densify hair color by depositing light color back into hair fibers. Coming in 5 different shades, Christophe Robin Shade Variation Care can accomodate everyone, and should be used once a week, after hair has been cleansed properly. Please remember, only leave the mask on for 5 minutes the first time you use it, as to not deposit too much color into your hair. Wash your hands right away to avoid stained finger nails. This color is removed within 3-5 washes.