The hex color #f81c0e is a dark color. The web-safe version is Hex
#FF3300. A complementary color is
#07E3F1. The grayscale version is
#616161. A 20% lighter version of the original color is
#FF4F41, and Hex
#C50000 is the 20% darker color. If the color is saturated by 10%, you get
#FF1506. If the color is desaturated by 10%, the color
#E92316 is obtained.