The hex color #2b837c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#D47C83. The grayscale version is
#636363. A 20% lighter version of the original color is
#5EB6AF, and Hex
#005049 is the 20% darker color. If the color is saturated by 10%, you get
#25867E. If the color is desaturated by 10%, the color
#31807A is obtained.