The hex color #dd1e1e is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#22E1E1. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#FF5151, and Hex
#AA0000 is the 20% darker color. If the color is saturated by 10%, you get
#EA1818. If the color is desaturated by 10%, the color
#D02424 is obtained.