The hex color #661d0c is a dark color. The web-safe version is Hex
#663300. A complementary color is
#99E2F3. The grayscale version is
#303030. A 20% lighter version of the original color is
#99503F, and Hex
#330000 is the 20% darker color. If the color is saturated by 10%, you get
#6B1B08. If the color is desaturated by 10%, the color
#611F10 is obtained.