HELP How I Reverse My Ombre Hair

Hi all,
i need sugesstion and recommendations. I colored my hair in may of this year and it has faded more than it has grown out. Right now the top layers of my hair are a coppery brown. I have a dark brown/almost black box dye waiting to be used. I was wondering if I could do a reverse hombre with this because I don't want to dye all my hair and have the fading/roots growing problem again. (I'm trying to grow the hair dye out). Anyway, what would you recommend? Does it sounds like it might not look to bad? Thanks for your help! :)

I agree with the user above don't think it would go too bad!
if you want to just trial before you do it use temporary dye and see how it goes
I recommend spilt milk its a dry shampoo too so win win!