The hex color #3a1b2a is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C5E4D5. The grayscale version is
#2A2A2A. A 20% lighter version of the original color is
#6D4E5D, and Hex
#070000 is the 20% darker color. If the color is saturated by 10%, you get
#3C192A. If the color is desaturated by 10%, the color
#381D2A is obtained.