The hex color #a9e20f is a light color. The web-safe version is Hex
#99CC00. A complementary color is
#561DF0. The grayscale version is
#898989. A 20% lighter version of the original color is
#DCFF42, and Hex
#76AF00 is the 20% darker color. If the color is saturated by 10%, you get
#ACEB03. If the color is desaturated by 10%, the color
#A6D91B is obtained.