The hex color #df375e is a dark color. The web-safe version is Hex
#CC3366. A complementary color is
#20C8A1. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#FF6A91, and Hex
#AC042B is the 20% darker color. If the color is saturated by 10%, you get
#E9305B. If the color is desaturated by 10%, the color
#D53E61 is obtained.