The hex color #3d367d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C2C982. The grayscale version is
#505050. A 20% lighter version of the original color is
#7069B0, and Hex
#0A034A is the 20% darker color. If the color is saturated by 10%, you get
#3B3382. If the color is desaturated by 10%, the color
#3F3979 is obtained.