Hex #5583aa or rgb(85,131,170) in RGB space is the tint of blue. It has hue angle of 207.53 degrees, value = 67 and saturation = 50. #5583aa can be obtained by mixing 4 colors: 2 drops of red, 3 drops of blue, 3 drops of cyan, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #5583aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5583aa to the mixer and play with it.