The hex color #3f523c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#C0ADC3. The grayscale version is
#444444. A 20% lighter version of the original color is
#72856F, and Hex
#0C1F09 is the 20% darker color. If the color is saturated by 10%, you get
#3E533B. If the color is desaturated by 10%, the color
#40513D is obtained.