The hex color #3d938f is a dark color. The web-safe version is Hex
#339999. A complementary color is
#C26C70. The grayscale version is
#757575. A 20% lighter version of the original color is
#70C6C2, and Hex
#0A605C is the 20% darker color. If the color is saturated by 10%, you get
#379692. If the color is desaturated by 10%, the color
#43908C is obtained.