The hex color #c9cf5f is a light color. The web-safe version is Hex
#CCCC66. A complementary color is
#3630A0. The grayscale version is
#A8A8A8. A 20% lighter version of the original color is
#FCFF92, and Hex
#969C2C is the 20% darker color. If the color is saturated by 10%, you get
#CCD358. If the color is desaturated by 10%, the color
#C6CB66 is obtained.