The hex color #b00d2d is a dark color. The web-safe version is Hex
#990033. A complementary color is
#4FF2D2. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#E34060, and Hex
#7D0000 is the 20% darker color. If the color is saturated by 10%, you get
#BA072A. If the color is desaturated by 10%, the color
#A61430 is obtained.