Olia Permanent Hair Color 5.35 Rich Chocolate. At Garnier, we know that oil can do much more than just condition your hair. When concentrated at the heart of the Olia permanent brown hair dye formula, oil maximizes the brown hair color result. Garnier Olia permanent hair dye is a 60% oil-powered formula, with natural flower oils and ammonia free for a pleasant scent. Our at home hair dye visibly improves the quality of hair, for better shine and 35% smoother hair. Olia home hair color will also provide maximum color performance for lavish, vivid and long-lasting brown hair. Plus, Olia home hair color has a unique sensorial application and optimal scalp comfort with our non-drip smooth velvety texture of the colorant cream. Instrumental test vs before and after coloration.