The hex color #3fb8af is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#C04750. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#72EBE2, and Hex
#0C857C is the 20% darker color. If the color is saturated by 10%, you get
#37BCB2. If the color is desaturated by 10%, the color
#47B4AC is obtained.