The hex color #3d367f is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C2C980. The grayscale version is
#515151. A 20% lighter version of the original color is
#7069B2, and Hex
#0A034C is the 20% darker color. If the color is saturated by 10%, you get
#3B3384. If the color is desaturated by 10%, the color
#3F397A is obtained.