The hex color #f3503c is a dark color. The web-safe version is Hex
#FF6633. A complementary color is
#0CAFC3. The grayscale version is
#808080. A 20% lighter version of the original color is
#FF836F, and Hex
#C01D09 is the 20% darker color. If the color is saturated by 10%, you get
#FF4B35. If the color is desaturated by 10%, the color
#E75543 is obtained.