The hex color #28689c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#D79763. The grayscale version is
#646464. A 20% lighter version of the original color is
#5B9BCF, and Hex
#003569 is the 20% darker color. If the color is saturated by 10%, you get
#2268A2. If the color is desaturated by 10%, the color
#2E6896 is obtained.