The hex color #f43f04 is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#0BC0FB. The grayscale version is
#686868. A 20% lighter version of the original color is
#FF7237, and Hex
#C10C00 is the 20% darker color. If the color is saturated by 10%, you get
#FF3B00. If the color is desaturated by 10%, the color
#E6430E is obtained.