The hex color #821c09 is a dark color. The web-safe version is Hex
#993300. A complementary color is
#7DE3F6. The grayscale version is
#383838. A 20% lighter version of the original color is
#B54F3C, and Hex
#4F0000 is the 20% darker color. If the color is saturated by 10%, you get
#891904. If the color is desaturated by 10%, the color
#7B1F0E is obtained.