Hex #406387 or rgb(64,99,135) in RGB space is the tint of blue. It has hue angle of 210.42 degrees, value = 53 and saturation = 53. #406387 can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #336699. Below you can see the block with #406387 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406387 to the mixer and play with it.