The hex color #77040c is a dark color. The web-safe version is Hex
#660000. A complementary color is
#88FBF3. The grayscale version is
#2D2D2D. A 20% lighter version of the original color is
#AA373F, and Hex
#440000 is the 20% darker color. If the color is saturated by 10%, you get
#7E0009. If the color is desaturated by 10%, the color
#70080F is obtained.