The hex color #a01b31 is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5FE4CE. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#D34E64, and Hex
#6D0000 is the 20% darker color. If the color is saturated by 10%, you get
#A8162E. If the color is desaturated by 10%, the color
#982034 is obtained.