The hex color #a70b2d is a dark color. The web-safe version is Hex
#990033. A complementary color is
#58F4D2. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#DA3E60, and Hex
#740000 is the 20% darker color. If the color is saturated by 10%, you get
#B0052A. If the color is desaturated by 10%, the color
#9E1130 is obtained.