The hex color #3b9c8f is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C46370. The grayscale version is
#777777. A 20% lighter version of the original color is
#6ECFC2, and Hex
#08695C is the 20% darker color. If the color is saturated by 10%, you get
#35A091. If the color is desaturated by 10%, the color
#41988D is obtained.