The hex color #40a01f is a dark color. The web-safe version is Hex
#339933. A complementary color is
#BF5FE0. The grayscale version is
#555555. A 20% lighter version of the original color is
#73D352, and Hex
#0D6D00 is the 20% darker color. If the color is saturated by 10%, you get
#3EA81A. If the color is desaturated by 10%, the color
#429924 is obtained.