The hex color #3fbab8 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C04547. The grayscale version is
#909090. A 20% lighter version of the original color is
#72EDEB, and Hex
#0C8785 is the 20% darker color. If the color is saturated by 10%, you get
#37BEBC. If the color is desaturated by 10%, the color
#47B6B4 is obtained.