Permanent at-home hair dye: Convenient hair color kit for at-home use co-developed with salon experts for long-lasting gray coverage. Keratin enriched hair color: Nourishing, ammonia-free hair color formula is infused with keratin and silk amino acid to leave hair in better condition than before you colored it. Easy to use hair color kit: Changing your look or covering greys is simple with an easy at-home process from root to tip.