The hex color #e4000c is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#1BFFF3. The grayscale version is
#505050. A 20% lighter version of the original color is
#FF333F, and Hex
#B10000 is the 20% darker color. If the color is saturated by 10%, you get
#F30005. If the color is desaturated by 10%, the color
#D50813 is obtained.