The hex color #0a588c is a dark color. The web-safe version is Hex
#006699. A complementary color is
#F5A773. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#3D8BBF, and Hex
#002559 is the 20% darker color. If the color is saturated by 10%, you get
#035992. If the color is desaturated by 10%, the color
#115786 is obtained.