The hex color #3fa01c is a dark color. The web-safe version is Hex
#339933. A complementary color is
#C05FE3. The grayscale version is
#545454. A 20% lighter version of the original color is
#72D34F, and Hex
#0C6D00 is the 20% darker color. If the color is saturated by 10%, you get
#3DA816. If the color is desaturated by 10%, the color
#419822 is obtained.