The hex color #c93e2e is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#36C1D1. The grayscale version is
#676767. A 20% lighter version of the original color is
#FC7161, and Hex
#960B00 is the 20% darker color. If the color is saturated by 10%, you get
#D33A28. If the color is desaturated by 10%, the color
#BF4234 is obtained.