I believe its impossible to return processed hair to its beginning color no matter what you do, id say just dye it back to a similar color to yours and then grow out your hair meanwhile little by little trimming away the dyed parts
cat...im a kitty cat...and i dance dance dance
2B/2C hair!

Shampoo: GTTT, SheaMoisture
Condish Tresemme naturals, GFTN
DT: Lustrasilk + honey
Styling products: Ouidad CC, TIGI Catwalk, KCCC, PaulMitchell Sculpting Foam
Oils: Coconut