The hex color #1d3ad3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E2C52C. The grayscale version is
#636363. A 20% lighter version of the original color is
#506DFF, and Hex
#0007A0 is the 20% darker color. If the color is saturated by 10%, you get
#1636DE. If the color is desaturated by 10%, the color
#243EC8 is obtained.