Stand Out Semi-Permanent Colour. Zero Commitment! #COLOURYOURWAY with Colorista Washouts. A semi-permanent hair colour that lets you have all the fun with zero commitment. Create the look you want, mix and match colours for a unique ombre look or go all out with an all over coloured hair look. Pastels designed specifically for blondes or pre-lighten dark hair and vivids for brunettes. Our Colorista Washout in Blue has been specifically designed for blondes who want a pastel colour pay off. The crème washout formula conditions while it colours and lasts between 10-20+ shampoos. Careful! This shade might fade to green as it washes out.Apply to clean, dry hair, let the colour develop for 15-20 minutes for blonde shades and 20-30 minutes for brunette shades, then rinse until water runs clear. Available in-store or online.