The hex color #a1091e is a dark color. The web-safe version is Hex
#990033. A complementary color is
#5EF6E1. The grayscale version is
#434343. A 20% lighter version of the original color is
#D43C51, and Hex
#6E0000 is the 20% darker color. If the color is saturated by 10%, you get
#AA031A. If the color is desaturated by 10%, the color
#980F22 is obtained.