The hex color #d5212c is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#2ADED3. The grayscale version is
#616161. A 20% lighter version of the original color is
#FF545F, and Hex
#A20000 is the 20% darker color. If the color is saturated by 10%, you get
#E11B27. If the color is desaturated by 10%, the color
#C92731 is obtained.