The hex color #f90d16 is a dark color. The web-safe version is Hex
#FF0000. A complementary color is
#06F2E9. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#FF4049, and Hex
#C60000 is the 20% darker color. If the color is saturated by 10%, you get
#FF050F. If the color is desaturated by 10%, the color
#EA151D is obtained.