The hex color #3F9A30 is a dark color. The web-safe version is Hex
#339933. A complementary color is
#C065CF. The grayscale version is
#585858. A 20% lighter version of the original color is
#72CD63, and Hex
#0C6700 is the 20% darker color. If the color is saturated by 10%, you get
#3CA12C. If the color is desaturated by 10%, the color
#429334 is obtained.