The hex color #31f72c is a light color. The web-safe version is Hex
#33FF33. A complementary color is
#CE08D3. The grayscale version is
#717171. A 20% lighter version of the original color is
#64FF5F, and Hex
#00C400 is the 20% darker color. If the color is saturated by 10%, you get
#2BFF25. If the color is desaturated by 10%, the color
#37EA33 is obtained.