The hex color #b80c1a is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#47F3E5. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#EB3F4D, and Hex
#850000 is the 20% darker color. If the color is saturated by 10%, you get
#C30615. If the color is desaturated by 10%, the color
#AD121F is obtained.