The hex color #a6150d is a dark color. The web-safe version is Hex
#990000. A complementary color is
#59EAF2. The grayscale version is
#434343. A 20% lighter version of the original color is
#D94840, and Hex
#730000 is the 20% darker color. If the color is saturated by 10%, you get
#B01008. If the color is desaturated by 10%, the color
#9C1A12 is obtained.