The hex color #1b4fc8 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E4B037. The grayscale version is
#666666. A 20% lighter version of the original color is
#4E82FB, and Hex
#001C95 is the 20% darker color. If the color is saturated by 10%, you get
#144DD2. If the color is desaturated by 10%, the color
#2351BE is obtained.