The hex color #c9e30d is a light color. The web-safe version is Hex
#CCCC00. A complementary color is
#361CF2. The grayscale version is
#939393. A 20% lighter version of the original color is
#FCFF40, and Hex
#96B000 is the 20% darker color. If the color is saturated by 10%, you get
#CEEB00. If the color is desaturated by 10%, the color
#C4DB1A is obtained.