The hex color #554BA3 is a dark color. The web-safe version is Hex
#663399. A complementary color is
#AAB45C. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#887ED6, and Hex
#221870 is the 20% darker color. If the color is saturated by 10%, you get
#5348A9. If the color is desaturated by 10%, the color
#574E9D is obtained.