Hex #334f67 or rgb(51,79,103) in RGB space is the tint of blue. It has hue angle of 207.69 degrees, value = 40 and saturation = 50. #334f67 can be obtained by mixing 3 colors: 1 drop of red, 3 drops of blue, 1 drop of green.
Nearest safe hex - #336666. Below you can see the block with #334f67 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #334f67 to the mixer and play with it.