The hex color #d7291c is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#28D6E3. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#FF5C4F, and Hex
#A40000 is the 20% darker color. If the color is saturated by 10%, you get
#E32415. If the color is desaturated by 10%, the color
#CB2E23 is obtained.