The hex color #1d3453 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E2CBAC. The grayscale version is
#373737. A 20% lighter version of the original color is
#506786, and Hex
#000120 is the 20% darker color. If the color is saturated by 10%, you get
#1A3456. If the color is desaturated by 10%, the color
#203450 is obtained.