The hex color #a3050b is a dark color. The web-safe version is Hex
#990000. A complementary color is
#5CFAF4. The grayscale version is
#3C3C3C. A 20% lighter version of the original color is
#D6383E, and Hex
#700000 is the 20% darker color. If the color is saturated by 10%, you get
#AD0006. If the color is desaturated by 10%, the color
#990A10 is obtained.