[header] How to lighten dyed hair [title] Rinse your hair with hot water. [step] The heat will open up the cuticles, allowing more of the dye to be stripped out. Thoroughly saturate your hair, in either the shower or over the sink. 
[title] Wash with a non-color-safe clarifying shampoo. [step] The shampoo should be used immediately after you undergo your unsatisfactory coloring, and should strip some of the new color from your hair.