The hex color #28529c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#D7AD63. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#5B85CF, and Hex
#001F69 is the 20% darker color. If the color is saturated by 10%, you get
#2351A2. If the color is desaturated by 10%, the color
#2D5396 is obtained.