The hex color #3a1f77 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C5E088. The grayscale version is
#454545. A 20% lighter version of the original color is
#6D52AA, and Hex
#070044 is the 20% darker color. If the color is saturated by 10%, you get
#391B7C. If the color is desaturated by 10%, the color
#3B2372 is obtained.