Eye shadow is applied above the eye lids on a downward tilted area of the face. The idea is to darken the eyes and accentuate the eye color. Usually the color used is blue, even if the eye color is not blue. Often there are multiple colors used on different parts of the eye area. There is the eyelid, the boundary between eyelid and brow bone, and the brow bone itself. The contrast between the applied colors can be fantastic and bring out the color of any eyes. 
