The hex color #d5190c is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#2AE6F3. The grayscale version is
#535353. A 20% lighter version of the original color is
#FF4C3F, and Hex
#A20000 is the 20% darker color. If the color is saturated by 10%, you get
#E21305. If the color is desaturated by 10%, the color
#C81F13 is obtained.