The hex color #a30e1e is a dark color. The web-safe version is Hex
#990033. A complementary color is
#5CF1E1. The grayscale version is
#454545. A 20% lighter version of the original color is
#D64151, and Hex
#700000 is the 20% darker color. If the color is saturated by 10%, you get
#AC091A. If the color is desaturated by 10%, the color
#9A1422 is obtained.