The hex color #337f3f is a dark color. The web-safe version is Hex
#336633. A complementary color is
#CC80C0. The grayscale version is
#505050. A 20% lighter version of the original color is
#66B272, and Hex
#004C0C is the 20% darker color. If the color is saturated by 10%, you get
#30843D. If the color is desaturated by 10%, the color
#367A41 is obtained.