The hex color #a1372c is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5EC8D3. The grayscale version is
#575757. A 20% lighter version of the original color is
#D46A5F, and Hex
#6E0400 is the 20% darker color. If the color is saturated by 10%, you get
#A83428. If the color is desaturated by 10%, the color
#9A3A30 is obtained.