seriously, this is a problem for the proffessionals. Don't try and do it yourself. i am a hairdresser and there is a product used in salons to strip colour but it does need to be done properly cause its quite tricky. After it is stripped it needs colour adding back into it.
Hmmm think I will skip it then! It was just a thought, my hair is naturally dark blonde but I dye it quite dark brown. Think I will just let the colour fade and hope for the best.
If You Mix Salt In With Your Shampoo Works , After You Have Washed It With Shampoo , Rinsie It Out ( So There Is No More Salt Left ) And Wash It With Shampoo Again ( Dont Add Salt ) And Then Wash With Your Conditioner . I Tried It And It Worked