The hex color #3a397d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C5C682. The grayscale version is
#505050. A 20% lighter version of the original color is
#6D6CB0, and Hex
#07064A is the 20% darker color. If the color is saturated by 10%, you get
#383782. If the color is desaturated by 10%, the color
#3C3B79 is obtained.