The hex color #1b3de9 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E4C216. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#4E70FF, and Hex
#000AB6 is the 20% darker color. If the color is saturated by 10%, you get
#1338F6. If the color is desaturated by 10%, the color
#2342DC is obtained.