The hex color #a3d039 is a light color. The web-safe version is Hex
#99CC33. A complementary color is
#5C2FC6. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#D6FF6C, and Hex
#709D06 is the 20% darker color. If the color is saturated by 10%, you get
#A5D730. If the color is desaturated by 10%, the color
#A1C942 is obtained.