The hex color #1e3e7d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E1C182. The grayscale version is
#484848. A 20% lighter version of the original color is
#5171B0, and Hex
#000B4A is the 20% darker color. If the color is saturated by 10%, you get
#1A3D82. If the color is desaturated by 10%, the color
#223F78 is obtained.