The hex color #8d010c is a dark color. The web-safe version is Hex
#990000. A complementary color is
#72FEF3. The grayscale version is
#333333. A 20% lighter version of the original color is
#C0343F, and Hex
#5A0000 is the 20% darker color. If the color is saturated by 10%, you get
#960008. If the color is desaturated by 10%, the color
#840610 is obtained.