Hex #172f55 or rgb(23,47,85) in RGB space is the tint of blue. It has hue angle of 216.77 degrees, value = 33 and saturation = 73. #172f55 can be obtained by mixing 4 colors: 1 drop of red, 4 drops of blue, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #003366. Below you can see the block with #172f55 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #172f55 to the mixer and play with it.