The hex color #b70a04 is a dark color. The web-safe version is Hex
#CC0000. A complementary color is
#48F5FB. The grayscale version is
#424242. A 20% lighter version of the original color is
#EA3D37, and Hex
#840000 is the 20% darker color. If the color is saturated by 10%, you get
#C30400. If the color is desaturated by 10%, the color
#AB100A is obtained.