The hex color #c53e37 is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#3AC1C8. The grayscale version is
#696969. A 20% lighter version of the original color is
#F8716A, and Hex
#920B04 is the 20% darker color. If the color is saturated by 10%, you get
#CE3A32. If the color is desaturated by 10%, the color
#BC423C is obtained.