The hex color #dd3d25 is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#22C2DA. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#FF7058, and Hex
#AA0A00 is the 20% darker color. If the color is saturated by 10%, you get
#E8381E. If the color is desaturated by 10%, the color
#D2422C is obtained.