Hex #55a4aa or rgb(85,164,170) in RGB space is the tint of cyan. It has hue angle of 184.24 degrees, value = 67 and saturation = 50. #55a4aa can be obtained by mixing 3 colors: 1 drop of cyan, 1 drop of white, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #55a4aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a4aa to the mixer and play with it.