The hex color #c4ee4e is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#3B11B1. The grayscale version is
#ABABAB. A 20% lighter version of the original color is
#F7FF81, and Hex
#91BB1B is the 20% darker color. If the color is saturated by 10%, you get
#C7F545. If the color is desaturated by 10%, the color
#C1E757 is obtained.