The hex color #c4043d is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#3BFBC2. The grayscale version is
#575757. A 20% lighter version of the original color is
#F73770, and Hex
#91000A is the 20% darker color. If the color is saturated by 10%, you get
#CF003A. If the color is desaturated by 10%, the color
#B90C40 is obtained.