The hex color #3fb1a6 is a light color. The web-safe version is Hex
#339999. A complementary color is
#C04E59. The grayscale version is
#878787. A 20% lighter version of the original color is
#72E4D9, and Hex
#0C7E73 is the 20% darker color. If the color is saturated by 10%, you get
#38B5A9. If the color is desaturated by 10%, the color
#46ADA3 is obtained.