The hex color #c9e55d is a light color. The web-safe version is Hex
#CCCC66. A complementary color is
#361AA2. The grayscale version is
#AEAEAE. A 20% lighter version of the original color is
#FCFF90, and Hex
#96B22A is the 20% darker color. If the color is saturated by 10%, you get
#CCEA55. If the color is desaturated by 10%, the color
#C6E065 is obtained.