The hex color #e00d0e is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#1FF2F1. The grayscale version is
#545454. A 20% lighter version of the original color is
#FF4041, and Hex
#AD0000 is the 20% darker color. If the color is saturated by 10%, you get
#EE0607. If the color is desaturated by 10%, the color
#D21415 is obtained.