The hex color #3E367D is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C1C982. The grayscale version is
#505050. A 20% lighter version of the original color is
#7169B0, and Hex
#0B034A is the 20% darker color. If the color is saturated by 10%, you get
#3C3381. If the color is desaturated by 10%, the color
#403979 is obtained.