If you've been lusting after Christina Hendricks' lucious auburn locks, knowing your tone is key to avoid an adverse color reaction. Pick a permanent formula if you're ready to make a long-term commitment. Otherwise, opt for a dye that's semi-or demipermanent. If your skin tone is cool, look for blue-based shades; if it's warm, seek out natural auburn shades. As long as you stay on the same color level (such as medium brown to medium auburn), red can be a fun, easy way to energize your look. Note: If you spend lots of time in the sun or the pool, this might not be a good choice, as this shade is prone to fading.
Steal Christina's shade: Garnier Nutrisse Magnetic Coppers Nourishing Color Creme in Medium Natural Copper, $8; at mass retailers