Hex #55a3aa or rgb(85,163,170) in RGB space is the tint of cyan. It has hue angle of 184.94 degrees, value = 67 and saturation = 50. #55a3aa can be obtained by mixing 4 colors: 1 drop of red, 5 drops of cyan, 3 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #55a3aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a3aa to the mixer and play with it.