Hex #5580a4 or rgb(85,128,164) in RGB space is the tint of blue. It has hue angle of 207.34 degrees, value = 64 and saturation = 48. #5580a4 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of magenta, 5 drops of blue, 3 drops of cyan.
Nearest safe hex - #669999. Below you can see the block with #5580a4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5580a4 to the mixer and play with it.