The hex color #3fbfab is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#C04054. The grayscale version is
#8E8E8E. A 20% lighter version of the original color is
#72F2DE, and Hex
#0C8C78 is the 20% darker color. If the color is saturated by 10%, you get
#37C4AE. If the color is desaturated by 10%, the color
#47BAA8 is obtained.