The hex color #e11e3d is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#1EE1C2. The grayscale version is
#696969. A 20% lighter version of the original color is
#FF5170, and Hex
#AE000A is the 20% darker color. If the color is saturated by 10%, you get
#ED1639. If the color is desaturated by 10%, the color
#D52641 is obtained.