The hex color #548A8F is a dark color. The web-safe version is Hex
#669999. A complementary color is
#AB7570. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#87BDC2, and Hex
#21575C is the 20% darker color. If the color is saturated by 10%, you get
#508C91. If the color is desaturated by 10%, the color
#58888D is obtained.