The hex color #673a1e is a dark color. The web-safe version is Hex
#663333. A complementary color is
#98C5E1. The grayscale version is
#404040. A 20% lighter version of the original color is
#9A6D51, and Hex
#340700 is the 20% darker color. If the color is saturated by 10%, you get
#6B391B. If the color is desaturated by 10%, the color
#633B21 is obtained.