(First product that I used was the ColourB4 Remover) Blue has to be one of the hardest shades to strip from your hair. I found that the Colour B4 Remover did not work on my blue hair at all. After one bleach session it seemed to do the trick! The blue was made light enough for me to be able to colour over it. I'm really pleased with how my hair has turned out.

Please note: I am not a professional hair stylist. This method has worked for me and MY hair.