Hex #334866 or rgb(51,72,102) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 40 and saturation = 50. #334866 can be obtained by mixing 3 colors: 3 drops of blue, 2 drops of white, 5 drops of black.
Nearest safe hex - #333366. Below you can see the block with #334866 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #334866 to the mixer and play with it.