The hex color #df4a4f is a dark color. The web-safe version is Hex
#CC3366. A complementary color is
#20B5B0. The grayscale version is
#7D7D7D. A 20% lighter version of the original color is
#FF7D82, and Hex
#AC171C is the 20% darker color. If the color is saturated by 10%, you get
#E9454A. If the color is desaturated by 10%, the color
#D54F54 is obtained.