The hex color #a51a42 is a dark color. The web-safe version is Hex
#993333. A complementary color is
#5AE5BD. The grayscale version is
#565656. A 20% lighter version of the original color is
#D84D75, and Hex
#72000F is the 20% darker color. If the color is saturated by 10%, you get
#AD1440. If the color is desaturated by 10%, the color
#9D2044 is obtained.