Garnier Olia No Ammonia Permanent Hair Color is a revolutionary at-home hair dye that combines vibrant, long-lasting color with a nourishing, ammonia-free formula. Unlike traditional hair dyes, Olia is powered by a 60% oil blend including natural flower oils like sunflower and camellia which helps to propel color deep into the hair fiber, resulting in vivid, radiant color and 100% Grey coverage. This oil-powered technology not only enhances color performance but also visibly improves and restores hair, leaving it hydrated, silky, and up to three times shinier than uncolored, unwashed hair. The absence of ammonia means there's no harsh smell, making the coloring process more pleasant and comfortable.