The hex color #dd123b is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#22EDC4. The grayscale version is
#636363. A 20% lighter version of the original color is
#FF456E, and Hex
#AA0008 is the 20% darker color. If the color is saturated by 10%, you get
#E90A37. If the color is desaturated by 10%, the color
#D11A3F is obtained.