The hex color #c00e3e is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#3FF1C1. The grayscale version is
#595959. A 20% lighter version of the original color is
#F34171, and Hex
#8D000B is the 20% darker color. If the color is saturated by 10%, you get
#CA063B. If the color is desaturated by 10%, the color
#B61641 is obtained.