The hex color #1b50b8 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E4AF47. The grayscale version is
#616161. A 20% lighter version of the original color is
#4E83EB, and Hex
#001D85 is the 20% darker color. If the color is saturated by 10%, you get
#144EC1. If the color is desaturated by 10%, the color
#2252AF is obtained.