The hex color #e10c1a is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#1EF3E5. The grayscale version is
#585858. A 20% lighter version of the original color is
#FF3F4D, and Hex
#AE0000 is the 20% darker color. If the color is saturated by 10%, you get
#EF0414. If the color is desaturated by 10%, the color
#D31420 is obtained.