The hex color #8d311c is a dark color. The web-safe version is Hex
#993333. A complementary color is
#72CEE3. The grayscale version is
#494949. A 20% lighter version of the original color is
#C0644F, and Hex
#5A0000 is the 20% darker color. If the color is saturated by 10%, you get
#942F18. If the color is desaturated by 10%, the color
#863320 is obtained.