Garnier Olia Ammonia-Free Permanent Hair Colour 4.6 deep red is a vibrant and long-lasting hair dye that provides an intense reep red colour. It is ammonia-free which means it is gentle on the hair and scalp. This hair colour is formulated with natural flower oils which help to nourish and hydrate the hair leaving it soft and shiny. The unique formula of this hair dye ensures maximum colour payoff and even coverage. with Garnier Olia Ammonia-Free Permanent Hair Colour 4.6 deep red, you can achieve a bold and beautiful hair colour that lasts.