6 Shades of Color-Correcting Concealers, Decoded

The color: Peach

The problem: Blue or gray under-eye circles

Most effective on: Fair to tan complexions

How it works: Spot treating dark circles is an art! To master it, Stewart recommends the following technique. "Apply one dot to the inner corner of the under eye (or wherever the dark circle is the most noticeable) and blend toward the temple. Next, brighten with a yellow-tone concealer that is two shades lighter than your own skin tone." The extra steps go a long way — after trying this method, we looked like we had the best beauty sleep ever.

Try: Make Up For Ever Ultra HD Color Concealer ($27)