The hex color #518c20 is a dark color. The web-safe version is Hex
#669933. A complementary color is
#AE73DF. The grayscale version is
#545454. A 20% lighter version of the original color is
#84BF53, and Hex
#1E5900 is the 20% darker color. If the color is saturated by 10%, you get
#51921B. If the color is desaturated by 10%, the color
#518625 is obtained.