The hex color #df0109 is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#20FEF6. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#FF343C, and Hex
#AC0000 is the 20% darker color. If the color is saturated by 10%, you get
#EE0002. If the color is desaturated by 10%, the color
#D00910 is obtained.