The hex color #5d901b is a dark color. The web-safe version is Hex
#669933. A complementary color is
#A26FE4. The grayscale version is
#585858. A 20% lighter version of the original color is
#90C34E, and Hex
#2A5D00 is the 20% darker color. If the color is saturated by 10%, you get
#5E9615. If the color is desaturated by 10%, the color
#5D8A21 is obtained.