A salon told me I could mix a "small amount" of black hair dye with a medium gray dye (5) and get a dark gray. Do you all think this is true? My goal is to dye my hair dark gray (like rob zombie) I have about a 5 brown at the moment, and I'm guessing I would mix the dye with 20 developer and gray:black dye ratio would be 5:1? Thank you so much!
Jeff

In theory it should work, but how it comes out on your particular hair type will probably be suspect. I can suggest, however, that you test it on a small portion of your hair first.

Is it true ? Well yes based on their experience I guess. Who knows.

Tick