The hex color #554a53 is a dark color. The web-safe version is Hex
#663366. A complementary color is
#AAB5AC. The grayscale version is
#515151. A 20% lighter version of the original color is
#887D86, and Hex
#221720 is the 20% darker color. If the color is saturated by 10%, you get
#554953. If the color is desaturated by 10%, the color
#554B53 is obtained.