The hex color #c9fc7b is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#360384. The grayscale version is
#C0C0C0. A 20% lighter version of the original color is
#FCFFAE, and Hex
#96C948 is the 20% darker color. If the color is saturated by 10%, you get
#CAFF74. If the color is desaturated by 10%, the color
#C8F682 is obtained.