The hex color #39d91f is a light color. The web-safe version is Hex
#33CC33. A complementary color is
#C626E0. The grayscale version is
#666666. A 20% lighter version of the original color is
#6CFF52, and Hex
#06A600 is the 20% darker color. If the color is saturated by 10%, you get
#35E518. If the color is desaturated by 10%, the color
#3DCD26 is obtained.