Jerome Russell Bblonde Highlighting Kit No 2 lifts the hair colour by up to 6-7 shades, for professional results at home. This highlighting kit has been developed with nourishing avocado oils and seaweed extracts to deeply moisturise the hair during the highlighting process. The hair will be 6-7 shades blonder after use. It works on both light to dark brown hair. It is recommended to try this product out on a small part of the hair as a strand test before applying it all over. Always read the package instructions before use.