The hex color #dc231b is a dark color. The web-safe version is Hex
#CC3333. A complementary color is
#23DCE4. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#FF564E, and Hex
#A90000 is the 20% darker color. If the color is saturated by 10%, you get
#E91D14. If the color is desaturated by 10%, the color
#CF2922 is obtained.