No Yellow Hair Shampoo with Olive Oil for Grey and Blond. This Purple Shampoo is formulated to remove brassy colors that can appear in blonde, grey, and super lightened hair. It is rich in Olive Oil, fortifies the hair and leaves it shiny and residue-free. Usage Instructions: Apply to damp hair, distribute evenly, and massage thoroughly into the hair strands. Leave on for 1-3 minutes, then rinse with water and follow with a conditioner.