The hex color #404652 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#BFB9AD. The grayscale version is
#484848. A 20% lighter version of the original color is
#737985, and Hex
#0D131F is the 20% darker color. If the color is saturated by 10%, you get
#3F4653. If the color is desaturated by 10%, the color
#414651 is obtained.