The hex color #1B314B is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E4CEB4. The grayscale version is
#323232. A 20% lighter version of the original color is
#4E647E, and Hex
#000018 is the 20% darker color. If the color is saturated by 10%, you get
#19314D. If the color is desaturated by 10%, the color
#1D3149 is obtained.