The hex color #c9110c is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#36EEF3. The grayscale version is
#4D4D4D. A 20% lighter version of the original color is
#FC443F, and Hex
#960000 is the 20% darker color. If the color is saturated by 10%, you get
#D50B06. If the color is desaturated by 10%, the color
#BD1712 is obtained.