The hex color #3e444e is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C1BBB1. The grayscale version is
#454545. A 20% lighter version of the original color is
#717781, and Hex
#0B111B is the 20% darker color. If the color is saturated by 10%, you get
#3D444F. If the color is desaturated by 10%, the color
#3F444D is obtained.