The hex color #c01a0d is a dark color. The web-safe version is Hex
#CC3300. A complementary color is
#3FE5F2. The grayscale version is
#4D4D4D. A 20% lighter version of the original color is
#F34D40, and Hex
#8D0000 is the 20% darker color. If the color is saturated by 10%, you get
#CC1507. If the color is desaturated by 10%, the color
#B51F13 is obtained.