The hex color #1d598c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#E2A673. The grayscale version is
#565656. A 20% lighter version of the original color is
#508CBF, and Hex
#002659 is the 20% darker color. If the color is saturated by 10%, you get
#175991. If the color is desaturated by 10%, the color
#235987 is obtained.