Hex #559eaa or rgb(85,158,170) in RGB space is the tint of bluish cian. It has hue angle of 188.47 degrees, value = 67 and saturation = 50. #559eaa can be obtained by mixing 2 colors: 1 drop of red, 2 drops of cyan.
Nearest safe hex - #669999. Below you can see the block with #559eaa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559eaa to the mixer and play with it.