The hex color #df3f3a is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#20C0C5. The grayscale version is
#737373. A 20% lighter version of the original color is
#FF726D, and Hex
#AC0C07 is the 20% darker color. If the color is saturated by 10%, you get
#EA3A34. If the color is desaturated by 10%, the color
#D44440 is obtained.