The hex color #538e55 is a dark color. The web-safe version is Hex
#669966. A complementary color is
#AC71AA. The grayscale version is
#676767. A 20% lighter version of the original color is
#86C188, and Hex
#205B22 is the 20% darker color. If the color is saturated by 10%, you get
#519253. If the color is desaturated by 10%, the color
#558A57 is obtained.