Experience the power of L'Oréal Professionnel INOA No Ammonia Permanent Color 5.1, a permanent hair color with 100% grey coverage that is also gentle on the hair and scalp. This ammonia-free formula is designed to reduce hair damage while providing permanent, vibrant color. Enjoy salon-quality results and long-lasting color with L'Oréal Professionnel INOA No Ammonia.