Hex #5597ab or rgb(85,151,171) in RGB space is the tint of bluish cian. It has hue angle of 193.95 degrees, value = 67 and saturation = 50. #5597ab can be obtained by mixing 3 colors: 3 drops of blue, 1 drop of green, 2 drops of white.
Nearest safe hex - #669999. Below you can see the block with #5597ab color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5597ab to the mixer and play with it.