The hex color #3fd6a4 is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#C0295B. The grayscale version is
#939393. A 20% lighter version of the original color is
#72FFD7, and Hex
#0CA371 is the 20% darker color. If the color is saturated by 10%, you get
#37DDA6. If the color is desaturated by 10%, the color
#47CFA2 is obtained.