I dyed my hair blonde one time...the dye wasn't strong enough to do much to my dark brown hair though and it just lightened it a little and added more red highlights to it. I've gotten blonde streaks done before, but then I dyed my hair black and those are gone (it didn't actually turn out black though, it turned out an almost black brown color). I'm going to try hair color orange next. I'm using temporary dyes so it doesn't do much.