The hex color #a3fc3e is a light color. The web-safe version is Hex
#99FF33. A complementary color is
#5C03C1. The grayscale version is
#9F9F9F. A 20% lighter version of the original color is
#D6FF71, and Hex
#70C90B is the 20% darker color. If the color is saturated by 10%, you get
#A3FF34. If the color is desaturated by 10%, the color
#A3F348 is obtained.