The hex color #df3118 is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#20CEE7. The grayscale version is
#636363. A 20% lighter version of the original color is
#FF644B, and Hex
#AC0000 is the 20% darker color. If the color is saturated by 10%, you get
#EB2C11. If the color is desaturated by 10%, the color
#D3361F is obtained.