The hex color #c52f23 is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#3AD0DC. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#F86256, and Hex
#920000 is the 20% darker color. If the color is saturated by 10%, you get
#CF2A1D. If the color is desaturated by 10%, the color
#BB3429 is obtained.