The hex color #7a211c is a dark color. The web-safe version is Hex
#663333. A complementary color is
#85DEE3. The grayscale version is
#3D3D3D. A 20% lighter version of the original color is
#AD544F, and Hex
#470000 is the 20% darker color. If the color is saturated by 10%, you get
#801E19. If the color is desaturated by 10%, the color
#74241F is obtained.