The hex color #3d1111 is a dark color. The web-safe version is Hex
#330000. A complementary color is
#C2EEEE. The grayscale version is
#202020. A 20% lighter version of the original color is
#704444, and Hex
#0A0000 is the 20% darker color. If the color is saturated by 10%, you get
#401010. If the color is desaturated by 10%, the color
#3A1212 is obtained.