The hex color #315d3c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#CEA2C3. The grayscale version is
#434343. A 20% lighter version of the original color is
#64906F, and Hex
#002A09 is the 20% darker color. If the color is saturated by 10%, you get
#2F603B. If the color is desaturated by 10%, the color
#335A3D is obtained.