The color of the concealer should be slightly lighter than the skin tone: one-to-two shades at most. A too-light concealer is the most common mistake made. The concealer should reach up under the lower lashes, into the corner of the eye and can be blended to the top of the cheekbone. The best tool for this is our Camouflage Brush, with a finger for using the body's heat to work it into the skin. For very dark circles, you may layer concealer, powder, then concealer and powder again. Make sure they are put on in thin layers so you don't build too much product. Layering like this can be very effective.