Garnier Olia permanent bold hair dye - maximum colour performance for intense and even colour full of elegant reflects and long lasting shiny blonde hair colour Bold hair dye, with natural flower oils, Up to 100% grey coverage Put gloves and instantly mix the colour cream and the developer cream in the applicator bottle. Shake well. Apply the mix in sections, starting with your roots and working through to the ends 3. Leave to develop for up to 45mins, as stated on the instructions, depending on the result you wish to achieve. 4. Rinse until the water runs clear and apply the silk & shine conditioner and rinse again.