The hex color #1b3dbb is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E4C244. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#4E70EE, and Hex
#000A88 is the 20% darker color. If the color is saturated by 10%, you get
#153AC5. If the color is desaturated by 10%, the color
#2140B1 is obtained.