Wella Professionals Koleston Perfect range is one of the best for permanent hair colour, now with an improved formula available in 160 shades. With up to 5 levels of lift, hair will be transformed with its natural depth and shine intact. Its ME+ technology reduces the risk of allergic reactions during application. The flexible cream formula is designed for a quick and easy 1:1 ratio mix, promising a smooth application that stays in place on the hair. For ultimate salon colour, combine Koleston Perfect Colour with Wella Welloxon Perfect Developer. Key benefits include ME+ technology that reduces the risk of hypoallergenic reactions, up to 100% grey coverage, up to 5 levels of lift, easy application with a 1:1 ratio, and significantly reduced hair damage colour after colour. This product requires no habit change for stylists as it features the same mixing ratio, development time, and grey coverage, enhanced with easier mixing, more precise application, and an improved fragrance for a better experience for colourists and clients. Achieve colour that stays true to tone and provides significantly less damage colour after colour.