The hex color #52878c is a dark color. The web-safe version is Hex
#669999. A complementary color is
#AD7873. The grayscale version is
#777777. A 20% lighter version of the original color is
#85BABF, and Hex
#1F5459 is the 20% darker color. If the color is saturated by 10%, you get
#4E898E. If the color is desaturated by 10%, the color
#56858A is obtained.