The hex color #298f7c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#D67083. The grayscale version is
#676767. A 20% lighter version of the original color is
#5CC2AF, and Hex
#005C49 is the 20% darker color. If the color is saturated by 10%, you get
#23937E. If the color is desaturated by 10%, the color
#2F8B7A is obtained.