The hex color #cf611b is a dark color. The web-safe version is Hex
#CC6633. A complementary color is
#309EE4. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#FF944E, and Hex
#9C2E00 is the 20% darker color. If the color is saturated by 10%, you get
#D96013. If the color is desaturated by 10%, the color
#C56223 is obtained.