This under eye concealer works very well at covering darkness under the eyes.  It also seems to cancel out some of the redness, although the yellow in the correction kit I also have does a better job at cancelling any red.  I mix both of the colors of this concealer together to use under my eyes.  A little bit is all you need; you don't want it too thick, because then it sits in your lines/crinkles and looks bad.  I really like this concealer!