Hex #1575a3 or rgb(21,117,163) in RGB space is the tint of bluish cian. It has hue angle of 199.44 degrees, value = 64 and saturation = 87. #1575a3 can be obtained by mixing 4 colors: 1 drop of magenta, 3 drops of blue, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #006699. Below you can see the block with #1575a3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1575a3 to the mixer and play with it.