The hex color #a70c0e is a dark color. The web-safe version is Hex
#990000. A complementary color is
#58F3F1. The grayscale version is
#404040. A 20% lighter version of the original color is
#DA3F41, and Hex
#740000 is the 20% darker color. If the color is saturated by 10%, you get
#B10709. If the color is desaturated by 10%, the color
#9D1113 is obtained.