The hex color #8b010c is a dark color. The web-safe version is Hex
#990000. A complementary color is
#74FEF3. The grayscale version is
#333333. A 20% lighter version of the original color is
#BE343F, and Hex
#580000 is the 20% darker color. If the color is saturated by 10%, you get
#940008. If the color is desaturated by 10%, the color
#820610 is obtained.