The hex color #c9e33e is a light color. The web-safe version is Hex
#CCCC33. A complementary color is
#361CC1. The grayscale version is
#A3A3A3. A 20% lighter version of the original color is
#FCFF71, and Hex
#96B00B is the 20% darker color. If the color is saturated by 10%, you get
#CDE934. If the color is desaturated by 10%, the color
#C5DD48 is obtained.