The hex color #e01f11 is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#1FE0EE. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#FF5244, and Hex
#AD0000 is the 20% darker color. If the color is saturated by 10%, you get
#ED190A. If the color is desaturated by 10%, the color
#D32518 is obtained.