What it is: A semi-permanent hair color in a deep conditioning base that works by staining the outside of the hair with pigment.Who it's for: Natural or color-treated hair.What it does: Gloss+ boosts color with hydrating ingredients that leave hair soft, shiny and illuminated, without the hassle of mixing and without harsh peroxide or ammonia. Gloss+ is intended to enhance and deepen your current hair color, not to create dramatic hair color changes or cover grays. Use when color is lacking shin