The hex color #3FCC2D is a light color. The web-safe version is Hex
#33CC33. A complementary color is
#C033D2. The grayscale version is
#686868. A 20% lighter version of the original color is
#72FF60, and Hex
#0C9900 is the 20% darker color. If the color is saturated by 10%, you get
#3BD627. If the color is desaturated by 10%, the color
#43C233 is obtained.