The hex color #1d3dff is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E2C200. The grayscale version is
#737373. A 20% lighter version of the original color is
#5070FF, and Hex
#000ACC is the 20% darker color. If the color is saturated by 10%, you get
#1438FF. If the color is desaturated by 10%, the color
#2642F1 is obtained.