The hex color #de150c is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#21EAF3. The grayscale version is
#555555. A 20% lighter version of the original color is
#FF483F, and Hex
#AB0000 is the 20% darker color. If the color is saturated by 10%, you get
#EC0F05. If the color is desaturated by 10%, the color
#D01B13 is obtained.