The hex color #1d365d is a dark color. The web-safe version is Hex
#333366. A complementary color is
#E2C9A2. The grayscale version is
#3B3B3B. A 20% lighter version of the original color is
#506990, and Hex
#00032A is the 20% darker color. If the color is saturated by 10%, you get
#1A3660. If the color is desaturated by 10%, the color
#20365A is obtained.