The hex color #dd1a13 is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#22E5EC. The grayscale version is
#595959. A 20% lighter version of the original color is
#FF4D46, and Hex
#AA0000 is the 20% darker color. If the color is saturated by 10%, you get
#EA140C. If the color is desaturated by 10%, the color
#D0201A is obtained.