What is it: Tinted Hair Colour TreatmentBest for: Coloured or non-coloured hair. O&M CLEAN.tone helps to keep your hair colour looking fresh, nourished and shiny like you have just visited your colourist. COOL BLONDERecommended to help maintain cool ash tones on blonde to very light blonde hair.Helps eliminate unwanted yellow or brassy tones. Ideal for hair colour levels 7-9.Can be used on lightened and natural white/grey hair. Apply to washed and towel-dried hair using gloves. Massage onto lengths and ends. Leave in for 3 minutes for light tone results or longer (up to 10 minutes) for stronger tone results. Rinse thoroughly until water runs clear.