The hex color #4c576c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#B3A893. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#7F8A9F, and Hex
#192439 is the 20% darker color. If the color is saturated by 10%, you get
#4B576E. If the color is desaturated by 10%, the color
#4D576A is obtained.