The hex color #538e70 is a dark color. The web-safe version is Hex
#669966. A complementary color is
#AC718F. The grayscale version is
#707070. A 20% lighter version of the original color is
#86C1A3, and Hex
#205B3D is the 20% darker color. If the color is saturated by 10%, you get
#509170. If the color is desaturated by 10%, the color
#568B70 is obtained.