The hex color #b9013d is a dark color. The web-safe version is Hex
#CC0033. A complementary color is
#46FEC2. The grayscale version is
#525252. A 20% lighter version of the original color is
#EC3470, and Hex
#86000A is the 20% darker color. If the color is saturated by 10%, you get
#C3003B. If the color is desaturated by 10%, the color
#AF093F is obtained.