The hex color #c01b05 is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#3FE4FA. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#F34E38, and Hex
#8D0000 is the 20% darker color. If the color is saturated by 10%, you get
#CC1600. If the color is desaturated by 10%, the color
#B4200C is obtained.