The hex color #1d30d4 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E2CF2B. The grayscale version is
#606060. A 20% lighter version of the original color is
#5063FF, and Hex
#0000A1 is the 20% darker color. If the color is saturated by 10%, you get
#162BE0. If the color is desaturated by 10%, the color
#2435C8 is obtained.