The hex color #a3431d is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5CBCE2. The grayscale version is
#565656. A 20% lighter version of the original color is
#D67650, and Hex
#701000 is the 20% darker color. If the color is saturated by 10%, you get
#AB4117. If the color is desaturated by 10%, the color
#9B4523 is obtained.