The hex color #7a1f1a is a dark color. The web-safe version is Hex
#663333. A complementary color is
#85E0E5. The grayscale version is
#3C3C3C. A 20% lighter version of the original color is
#AD524D, and Hex
#470000 is the 20% darker color. If the color is saturated by 10%, you get
#801C17. If the color is desaturated by 10%, the color
#74221D is obtained.