Hex #55918e or rgb(85,145,142) in RGB space is the tint of cyan. It has hue angle of 177.00 degrees, value = 57 and saturation = 41. #55918e can be obtained by mixing 4 colors: 5 drops of blue, 3 drops of green, 5 drops of white, 2 drops of black.
Nearest safe hex - #669999. Below you can see the block with #55918e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55918e to the mixer and play with it.