The hex color #3d2d1f is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2D2E0. The grayscale version is
#2E2E2E. A 20% lighter version of the original color is
#706052, and Hex
#0A0000 is the 20% darker color. If the color is saturated by 10%, you get
#3F2D1E. If the color is desaturated by 10%, the color
#3B2D20 is obtained.