The hex color #f43f29 is a dark color. The web-safe version is Hex
#FF3333. A complementary color is
#0BC0D6. The grayscale version is
#747474. A 20% lighter version of the original color is
#FF725C, and Hex
#C10C00 is the 20% darker color. If the color is saturated by 10%, you get
#FF3A22. If the color is desaturated by 10%, the color
#E74431 is obtained.