That's where Claudia Steven's Hair Highlighter comes in. It comes in oodles of colors (black, bronze, mocha, gold, blue, and of course my personal fave, magenta). As a side note, my lovely friend Nicole over at Glossy Gurl opted for the cobalt blue hue and it looks absolutely fab on her.
Now I have to say that the actual product looks much more pink than the picture leads you to believe. It's a true magenta and somehow looks great with my newly dyed red locks. Here's a picture with some of the magenta mixed in: