The hex color #3d5d3d is a dark color. The web-safe version is Hex
#336633. A complementary color is
#C2A2C2. The grayscale version is
#484848. A 20% lighter version of the original color is
#709070, and Hex
#0A2A0A is the 20% darker color. If the color is saturated by 10%, you get
#3C5F3C. If the color is desaturated by 10%, the color
#3E5B3E is obtained.