Dia Light is specifically formulated for maximum shine and condition on coloured hair. Ideal for adding shine to hair that s previously been coloured, weakened or sensitised. This acidic tone-on-tone colour creates glossy luminous looking reflects and vinyl shine whilst respecting the condition with natural-looking colour that gradually fades away. DIA Light is great for offering a colour refresh to top up the vibrancy of your colour in between your usual permanent colour services.