The hex color #28567c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D7A983. The grayscale version is
#535353. A 20% lighter version of the original color is
#5B89AF, and Hex
#002349 is the 20% darker color. If the color is saturated by 10%, you get
#245680. If the color is desaturated by 10%, the color
#2C5678 is obtained.