The hex color #18859c is a dark color. The web-safe version is Hex
#009999. A complementary color is
#E77A63. The grayscale version is
#686868. A 20% lighter version of the original color is
#4BB8CF, and Hex
#005269 is the 20% darker color. If the color is saturated by 10%, you get
#1088A1. If the color is desaturated by 10%, the color
#208297 is obtained.