The hex color #e3390b is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#1CC6F4. The grayscale version is
#626262. A 20% lighter version of the original color is
#FF6C3E, and Hex
#B00600 is the 20% darker color. If the color is saturated by 10%, you get
#F03502. If the color is desaturated by 10%, the color
#D63D14 is obtained.