The hex color #3D2D31 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2D2CE. The grayscale version is
#343434. A 20% lighter version of the original color is
#706064, and Hex
#0A0000 is the 20% darker color. If the color is saturated by 10%, you get
#3E2C31. If the color is desaturated by 10%, the color
#3C2E31 is obtained.