MUST-HAVE KIT L'Oréal Paris Féria 74 Copper Shimmer ($10; drugstore.com).
PRO TIP For redheads wanting to go even redder, a kit with several different shades of the same hue will create the most natural-looking results. Multitonal kits (like Féria) give this kind of dimension but are still a one-step process, says Kyle White.Read MoreLess
Go Lighter, Darker, Redder! Find Your Perfect Celebrity Shade