The hex color #F42B05 is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#0BD4FA. The grayscale version is
#616161. A 20% lighter version of the original color is
#FF5E38, and Hex
#C10000 is the 20% darker color. If the color is saturated by 10%, you get
#FF2600. If the color is desaturated by 10%, the color
#E5300E is obtained.