I dyed red over my black hair which showed up like a very dark red and I liked it for a while but now I want to dye it green is it possible to go over it with green without bleaching? What would the color show up as. It would be fine if it was a dark green just I don't want like it to end up brown or something. The red is already hard to see cuse I didn't bleach it. So would the green go over it if I dyed it more than once?