Hex #718d85 or rgb(113,141,133) in RGB space is the tint of greenish cian. It has hue angle of 162.86 degrees, value = 55 and saturation = 20. #718d85 can be obtained by mixing 4 colors: 2 drops of yellow, 4 drops of blue, 2 drops of white, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #718d85 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718d85 to the mixer and play with it.