The hex color #f3440c is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#0CBBF3. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#FF773F, and Hex
#C01100 is the 20% darker color. If the color is saturated by 10%, you get
#FF4002. If the color is desaturated by 10%, the color
#E54816 is obtained.