The hex color #538b4c is a dark color. The web-safe version is Hex
#669933. A complementary color is
#AC74B3. The grayscale version is
#636363. A 20% lighter version of the original color is
#86BE7F, and Hex
#205819 is the 20% darker color. If the color is saturated by 10%, you get
#518F4A. If the color is desaturated by 10%, the color
#55874E is obtained.