The hex color #1d599c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#E2A663. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#508CCF, and Hex
#002669 is the 20% darker color. If the color is saturated by 10%, you get
#1759A2. If the color is desaturated by 10%, the color
#235996 is obtained.