Hex #55a28e or rgb(85,162,142) in RGB space is the tint of greenish cian. It has hue angle of 164.42 degrees, value = 64 and saturation = 48. #55a28e can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of cyan, 2 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #55a28e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a28e to the mixer and play with it.