The hex color #f11f0a is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#0EE0F5. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#FF523D, and Hex
#BE0000 is the 20% darker color. If the color is saturated by 10%, you get
#FF1902. If the color is desaturated by 10%, the color
#E22512 is obtained.