The hex color #3e9b74 is a dark color. The web-safe version is Hex
#339966. A complementary color is
#C1648B. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#71CEA7, and Hex
#0B6841 is the 20% darker color. If the color is saturated by 10%, you get
#399F75. If the color is desaturated by 10%, the color
#439774 is obtained.