The hex color #40a12d is a dark color. The web-safe version is Hex
#339933. A complementary color is
#BF5ED2. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#73D460, and Hex
#0D6E00 is the 20% darker color. If the color is saturated by 10%, you get
#3DA829. If the color is desaturated by 10%, the color
#439A32 is obtained.