The hex color #3fc97c is a light color. The web-safe version is Hex
#33CC66. A complementary color is
#C03683. The grayscale version is
#818181. A 20% lighter version of the original color is
#72FCAF, and Hex
#0C9649 is the 20% darker color. If the color is saturated by 10%, you get
#38D07B. If the color is desaturated by 10%, the color
#46C27D is obtained.