The hex color #409c5c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#BF63A3. The grayscale version is
#686868. A 20% lighter version of the original color is
#73CF8F, and Hex
#0D6929 is the 20% darker color. If the color is saturated by 10%, you get
#3CA15B. If the color is desaturated by 10%, the color
#44975D is obtained.