The hex color #a31c0a is a dark color. The web-safe version is Hex
#993300. A complementary color is
#5CE3F5. The grayscale version is
#434343. A 20% lighter version of the original color is
#D64F3D, and Hex
#700000 is the 20% darker color. If the color is saturated by 10%, you get
#AD1804. If the color is desaturated by 10%, the color
#992010 is obtained.