Hex #718571 or rgb(113,133,113) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 52 and saturation = 15. #718571 can be obtained by mixing 3 colors: 1 drop of green, 4 drops of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #718571 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718571 to the mixer and play with it.