The hex color #e51c20 is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#1AE3DF. The grayscale version is
#606060. A 20% lighter version of the original color is
#FF4F53, and Hex
#B20000 is the 20% darker color. If the color is saturated by 10%, you get
#F2151A. If the color is desaturated by 10%, the color
#D82326 is obtained.