The hex color #f4400d is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#0BBFF2. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#FF7340, and Hex
#C10D00 is the 20% darker color. If the color is saturated by 10%, you get
#FF3C04. If the color is desaturated by 10%, the color
#E64416 is obtained.