The hex color #599d8c is a light color. The web-safe version is Hex
#669999. A complementary color is
#A66273. The grayscale version is
#818181. A 20% lighter version of the original color is
#8CD0BF, and Hex
#266A59 is the 20% darker color. If the color is saturated by 10%, you get
#55A08D. If the color is desaturated by 10%, the color
#5D9A8B is obtained.