The hex color #a13d29 is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5EC2D6. The grayscale version is
#585858. A 20% lighter version of the original color is
#D4705C, and Hex
#6E0A00 is the 20% darker color. If the color is saturated by 10%, you get
#A83A24. If the color is desaturated by 10%, the color
#9A402E is obtained.