Hex #55a98e or rgb(85,169,142) in RGB space is the tint of greenish cian. It has hue angle of 160.71 degrees, value = 66 and saturation = 50. #55a98e can be obtained by mixing 3 colors: 1 drop of blue, 1 drop of green, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #55a98e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a98e to the mixer and play with it.