For contouring: Apply a shade 1-2 shades darker than your foundation on the areas you want to recede or create shadows on. Blend out with a makeup sponge or foundation brush, keeping the product in the area you applied it.
I'm so glad that I found this brand of concealer. I have very dark under eyes and this concealer conceals without creasing. And with so many colors you can mix and make your own personal color