So you've recently got a new dye job — only to find that your hair has turned into a brassy color rather than that gorgeous new shade you wanted. It can be infuriating when unwanted warm tones start ...

For people who dye their hair blond, or even certain shades of brunette, brassy hues are like cockroaches after the apocalypse. They just keep on keepin' on, reappearing no matter how cool-toned your ...