I have been a beautian for 43 years the answer to this is go to Sally Beauty supplu get color remover, Put it on the hair mix with water it will remove the color and then you may start agin if there isnt a Salley supply by you try to buy some Prell shampoo(this has a lot of detergent in it) shampoo youre hair let it set in for a while also if you have some peroxide 20 volume you may put 2 caps of theis in it to this helpsa get the dk color out hope this is helpful