The hex color #a01b2f is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5FE4D0. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#D34E62, and Hex
#6D0000 is the 20% darker color. If the color is saturated by 10%, you get
#A8162C. If the color is desaturated by 10%, the color
#982032 is obtained.