The hex color #a40f05 is a dark color. The web-safe version is Hex
#990000. A complementary color is
#5BF0FA. The grayscale version is
#3D3D3D. A 20% lighter version of the original color is
#D74238, and Hex
#710000 is the 20% darker color. If the color is saturated by 10%, you get
#AE0A00. If the color is desaturated by 10%, the color
#9A140B is obtained.