The hex color #1b35a8 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#E4CA57. The grayscale version is
#535353. A 20% lighter version of the original color is
#4E68DB, and Hex
#000275 is the 20% darker color. If the color is saturated by 10%, you get
#1532B1. If the color is desaturated by 10%, the color
#21389F is obtained.