The hex color #313b1d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#CEC4E2. The grayscale version is
#2E2E2E. A 20% lighter version of the original color is
#646E50, and Hex
#000800 is the 20% darker color. If the color is saturated by 10%, you get
#313C1B. If the color is desaturated by 10%, the color
#313A1F is obtained.