The hex color #28723c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#D78DC3. The grayscale version is
#474747. A 20% lighter version of the original color is
#5BA56F, and Hex
#003F09 is the 20% darker color. If the color is saturated by 10%, you get
#25763B. If the color is desaturated by 10%, the color
#2B6E3D is obtained.