The hex color #ac374c is a dark color. The web-safe version is Hex
#993333. A complementary color is
#53C8B3. The grayscale version is
#656565. A 20% lighter version of the original color is
#DF6A7F, and Hex
#790419 is the 20% darker color. If the color is saturated by 10%, you get
#B3324A. If the color is desaturated by 10%, the color
#A53C4F is obtained.