A fantastic light, bright blue from Crazy Color. This is a beautiful cool blue with a hint of Turquoise (bubblegum blue).For best results apply to pale blonde hair, using a tint brush to ensure even coverage. Work the colour into your hair until it foams slightly and allow to process for at least 20 minutes. Colour can be darkened slightly with a second application. Crazy Color does not require the addition of peroxide. For optimal results apply to pre-lightened hair. 100 ML Bottle Directions After shampooing, towel dry your hair. Apply Crazy Color direct, spreading evenly over the hair (wear gloves). Leave for 15/30 minutes, then rinse thoroughly until water runs clear.