The hex color #fdef9c is a light color. The web-safe version is Hex
#FFFF99. A complementary color is
#021063. The grayscale version is
#D8D8D8. A 20% lighter version of the original color is
#FFFFCF, and Hex
#CABC69 is the 20% darker color. If the color is saturated by 10%, you get
#FFF196. If the color is desaturated by 10%, the color
#F9EDA2 is obtained.