The hex color #7a042c is a dark color. The web-safe version is Hex
#660033. A complementary color is
#85FBD3. The grayscale version is
#393939. A 20% lighter version of the original color is
#AD375F, and Hex
#470000 is the 20% darker color. If the color is saturated by 10%, you get
#81002B. If the color is desaturated by 10%, the color
#73092D is obtained.