The hex color #af0312 is a dark color. The web-safe version is Hex
#990000. A complementary color is
#50FCED. The grayscale version is
#414141. A 20% lighter version of the original color is
#E23645, and Hex
#7C0000 is the 20% darker color. If the color is saturated by 10%, you get
#BA000D. If the color is desaturated by 10%, the color
#A40917 is obtained.