The hex color #3d133d is a dark color. The web-safe version is Hex
#330033. A complementary color is
#C2ECC2. The grayscale version is
#2F2F2F. A 20% lighter version of the original color is
#704670, and Hex
#0A000A is the 20% darker color. If the color is saturated by 10%, you get
#3E103E. If the color is desaturated by 10%, the color
#3C163C is obtained.