How do you get dark brown hair dye out of your red hair?

Okay well Unless the black hair dye was a semi or a wash in wash out you wont be able to get it out of your hair.

Basically any hairdresser would put a good semi permanat on it which would lift the colour making your black her brown!

So go to your hair dresser but makesure its a good one so you can get the exact colour you want!

Hope this helps!