The hex color #d52e1a is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#2AD1E5. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#FF614D, and Hex
#A20000 is the 20% darker color. If the color is saturated by 10%, you get
#E12913. If the color is desaturated by 10%, the color
#C93321 is obtained.