The hex color #cf240c is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#30DBF3. The grayscale version is
#555555. A 20% lighter version of the original color is
#FF573F, and Hex
#9C0000 is the 20% darker color. If the color is saturated by 10%, you get
#DB1F05. If the color is desaturated by 10%, the color
#C32913 is obtained.