The hex color #a7041d is a dark color. The web-safe version is Hex
#990033. A complementary color is
#58FBE2. The grayscale version is
#434343. A 20% lighter version of the original color is
#DA3750, and Hex
#740000 is the 20% darker color. If the color is saturated by 10%, you get
#B10019. If the color is desaturated by 10%, the color
#9D0A21 is obtained.