The hex color #dd1a31 is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#22E5CE. The grayscale version is
#636363. A 20% lighter version of the original color is
#FF4D64, and Hex
#AA0000 is the 20% darker color. If the color is saturated by 10%, you get
#E9132C. If the color is desaturated by 10%, the color
#D12136 is obtained.