Hi.  I have a two part answer.  First, if you choose to go use color remover, go to a professional and make sure they use one of those sulfur removers. (I think the most common one is Vanish.)  I used a bleach-based remover once and it was too hard on my hair -- and I have hair of iron.  The second part of my answer is based my experience going lighter after Inoa.  My hair was crazy dark after my Inoa disaster.  I did shampoo lightening (a "shampoo train") for a week. (Use a powerful high sulfate shampoo -- get that Malibu one, if you can -- and use it on your hair, vigorously rubbing your hair between your flattened palms for as long as you can spare.  I spent 10 minutes a day doing this for a week, usually soaping up two or three times each wash.  My hair lightened about two levels in that time.)  I then had very light highlights done, but I didn't touch the base color.  The base continued to fade; a few months later, it is almost the color it was before the Inoa treatment.