The hex color #3d365e is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C2C9A1. The grayscale version is
#464646. A 20% lighter version of the original color is
#706991, and Hex
#0A032B is the 20% darker color. If the color is saturated by 10%, you get
#3C3460. If the color is desaturated by 10%, the color
#3E385C is obtained.