The hex color #1b39e8 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E4C617. The grayscale version is
#696969. A 20% lighter version of the original color is
#4E6CFF, and Hex
#0006B5 is the 20% darker color. If the color is saturated by 10%, you get
#1334F5. If the color is desaturated by 10%, the color
#233EDB is obtained.