The hex color #dd3903 is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#22C6FC. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#FF6C36, and Hex
#AA0600 is the 20% darker color. If the color is saturated by 10%, you get
#EA3500. If the color is desaturated by 10%, the color
#D03D0C is obtained.