Hex #559b83 or rgb(85,155,131) in RGB space is the tint of greenish cian. It has hue angle of 159.43 degrees, value = 61 and saturation = 45. #559b83 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of magenta, 5 drops of cyan, 5 drops of green.
Nearest safe hex - #669999. Below you can see the block with #559b83 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #559b83 to the mixer and play with it.