The hex color #c10010 is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#3EFFEF. The grayscale version is
#464646. A 20% lighter version of the original color is
#F43343, and Hex
#8E0000 is the 20% darker color. If the color is saturated by 10%, you get
#CD000B. If the color is desaturated by 10%, the color
#B50715 is obtained.