The hex color #539b4c is a dark color. The web-safe version is Hex
#669933. A complementary color is
#AC64B3. The grayscale version is
#696969. A 20% lighter version of the original color is
#86CE7F, and Hex
#206819 is the 20% darker color. If the color is saturated by 10%, you get
#51A049. If the color is desaturated by 10%, the color
#55964F is obtained.