The hex color #1b428c is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E4BD73. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#4E75BF, and Hex
#000F59 is the 20% darker color. If the color is saturated by 10%, you get
#164192. If the color is desaturated by 10%, the color
#204386 is obtained.