Hex #55a099 or rgb(85,160,153) in RGB space is the tint of cyan. It has hue angle of 174.40 degrees, value = 63 and saturation = 47. #55a099 can be obtained by mixing 4 colors: 4 drops of cyan, 1 drop of green, 5 drops of white, 5 drops of black.
Nearest safe hex - #669999. Below you can see the block with #55a099 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a099 to the mixer and play with it.