The hex color #a31e2e is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5CE1D1. The grayscale version is
#505050. A 20% lighter version of the original color is
#D65161, and Hex
#700000 is the 20% darker color. If the color is saturated by 10%, you get
#AB192B. If the color is desaturated by 10%, the color
#9B2331 is obtained.