Colorianne Prestige Tone on Tone is a great choice for those who want a gentle, ammonia-free hair color. This permanent dye contains no ammonia and covers up to 70% of gray. It is also formulated to nourish the hair. Hydro gloss technology complex, which is infused with hydrating molecules, provides the hair with a guaranteed shine and luminosity. The special formula ensures intense highlights, wash resistance and color stability that last overtime.