While we're allll for a bold red look, a more toned-down version can make just as much of an impact. If you want to add more flair to your light reddish brown hair, opt for a layered cut with cute ...

This hair dye will do it for you with a little bit of heat. The FIRE hair dye is a concept by Lauren Bowker. When it is hit by heat or cold, it changes its pigment chemistry to adjust its color.