The hex color #a51112 is a dark color. The web-safe version is Hex
#990000. A complementary color is
#5AEEED. The grayscale version is
#434343. A 20% lighter version of the original color is
#D84445, and Hex
#720000 is the 20% darker color. If the color is saturated by 10%, you get
#AF0C0D. If the color is desaturated by 10%, the color
#9B1617 is obtained.