The hex color #3b8f8b is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C47074. The grayscale version is
#727272. A 20% lighter version of the original color is
#6EC2BE, and Hex
#085C58 is the 20% darker color. If the color is saturated by 10%, you get
#36928E. If the color is desaturated by 10%, the color
#408C88 is obtained.