The hex color #d6331f is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#29CCE0. The grayscale version is
#636363. A 20% lighter version of the original color is
#FF6652, and Hex
#A30000 is the 20% darker color. If the color is saturated by 10%, you get
#E22E18. If the color is desaturated by 10%, the color
#CA3826 is obtained.