You can strip your hair to a point with Head & Shoulders.
I just bleach over mine which does goes ginger, but you can easily get that out with toner. Or Live XL tends to be pretty good although I've never used the red over black so I am unsure weather that would turn out well or not.
The world is just illusion always trying to change me.
You will find wonder wherever you can, and spread joy whenever you are able.
I felt emotions of gentleness and pleasure, that had long appeared dead, divide within me. - Frankenstein.
L'oreal Color Rays, it's made specifically to dye bright colors over dark hair without bleaching. BUT, it comes in small packages and is meant more for highlighting than all-over color. And it only comes in fuschia, red, and blonde.
Back in the day when I had a regular hair color, I used the fuschia over my dark brown and it came out REALLY bright. It was awesome. So maybe try that?
Or, you can bleach and dye. If you're looking for all-over color, that's your best bet.
Manic panic wont cover the color, you will have to bleach it LIGHTTTT to get it to work, lighter then someone with natuarlly light hair would have to have it. *Has had dyed black hair going on 8 years*
You can go to a hair stylist and pay a ton to have them strip the color, but there normally not able to get a lotttt. Depends how long you have been dying it. My sister let me do hers for fun one year, and she didnt care for it, used Dawn dishwashing soap every single day and it faded the color FAST to a real pretty dark red. Bleaching will get it lighter, but will KILL your hair. I had to chop of almost all of my hair after trying that :(