The hex color #e40e2e is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#1BF1D1. The grayscale version is
#606060. A 20% lighter version of the original color is
#FF4161, and Hex
#B10000 is the 20% darker color. If the color is saturated by 10%, you get
#F10629. If the color is desaturated by 10%, the color
#D71633 is obtained.