It is a color correction to be applied to the regrowth of dyed hair. The high concentration of pigments allows it to adapt perfectly to your color. It washes out with one shampoo and does not stain. The products in the Hair Touch Up line can also be used to create tone-on-tone color contrasts of up to 2-3 shades, create shadow areas, and achieve a California Blonde or Reverse Ombré effect.