The hex color #3A1A2B is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C5E5D4. The grayscale version is
#2A2A2A. A 20% lighter version of the original color is
#6D4D5E, and Hex
#070000 is the 20% darker color. If the color is saturated by 10%, you get
#3C182B. If the color is desaturated by 10%, the color
#381C2B is obtained.