Color-enhancing shampoo brightens and refreshes blonde, highlighted and silver hairnRenews and refreshes faded highlights and ash-toned hairnRemoves the dull yellow in silver hair, and leaves hair shiny without residuenShimmer Lights Shampoo is an award-winning, protein-enriched color-enhancing shampoo tones down brassiness on blonde or gray hair. Shimmer Lights refreshes faded highlights, removes the dull yellow in gray hair and leaves hair shiny without residue - and it can be used on natural or color-treated hair.