The hex color #c4e90a is a light color. The web-safe version is Hex
#CCFF00. A complementary color is
#3B16F5. The grayscale version is
#929292. A 20% lighter version of the original color is
#F7FF3D, and Hex
#91B600 is the 20% darker color. If the color is saturated by 10%, you get
#C9F200. If the color is desaturated by 10%, the color
#BFE018 is obtained.