Hex #173765 or rgb(23,55,101) in RGB space is the tint of blue. It has hue angle of 215.38 degrees, value = 40 and saturation = 77. #173765 can be obtained by mixing 3 colors: 5 drops of blue, 1 drop of white, 5 drops of black.
Nearest safe hex - #003366. Below you can see the block with #173765 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #173765 to the mixer and play with it.