L'Oréal Professionnel Dia Light is an Ammonia-free, semi-permanent, tone-on-tone colour that is specifically formulated for maximum shine and condition. It it ideal for hair that has been previously coloured, weakened or sensitised. Dia Light is the perfect partner for a colour refresh and toning lengths and ends in between regular colour services. The unique acid-gel cream technology ensures a seamless blend of colour. Dia Light seals the cuticle for a vinyl-like finish providing ultimate shine and +30% more conditioned hair*. The Dia Light range consists of a large palette of shades from warm beige to cool ash tones for brunettes and blondes, allowing you to create customizable shades for a personalised colour result. With the technology of Dia Light, it softens the hair fibre, and simply adds tone without any lift. *After Dia Light application on bleached hair. L'Oréal Professionnel Dia Light Demi Permanent Hair Colour - 4 Brown Home, Hair, HairColour&Bleach, DemiandSemiPermanentHairDye.