The hex color #671c3c is a dark color. The web-safe version is Hex
#663333. A complementary color is
#98E3C3. The grayscale version is
#404040. A 20% lighter version of the original color is
#9A4F6F, and Hex
#340009 is the 20% darker color. If the color is saturated by 10%, you get
#6B183C. If the color is desaturated by 10%, the color
#63203C is obtained.