The hex color #a73e37 is a dark color. The web-safe version is Hex
#993333. A complementary color is
#58C1C8. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#DA716A, and Hex
#740B04 is the 20% darker color. If the color is saturated by 10%, you get
#AE3B33. If the color is desaturated by 10%, the color
#A0413B is obtained.