The hex color #a30a10 is a dark color. The web-safe version is Hex
#990000. A complementary color is
#5CF5EF. The grayscale version is
#3F3F3F. A 20% lighter version of the original color is
#D63D43, and Hex
#700000 is the 20% darker color. If the color is saturated by 10%, you get
#AD050B. If the color is desaturated by 10%, the color
#990F15 is obtained.