The hex color #a7130d is a dark color. The web-safe version is Hex
#990000. A complementary color is
#58ECF2. The grayscale version is
#424242. A 20% lighter version of the original color is
#DA4640, and Hex
#740000 is the 20% darker color. If the color is saturated by 10%, you get
#B10E08. If the color is desaturated by 10%, the color
#9D1812 is obtained.