Hex #718d84 or rgb(113,141,132) in RGB space is the tint of greenish cian. It has hue angle of 160.71 degrees, value = 55 and saturation = 20. #718d84 can be obtained by mixing 4 colors: 1 drop of blue, 1 drop of green, 4 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #718d84 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718d84 to the mixer and play with it.