Hex #718b68 or rgb(113,139,104) in RGB space is the tint of grass green. It has hue angle of 104.57 degrees, value = 55 and saturation = 25. #718b68 can be obtained by mixing 4 colors: 3 drops of yellow, 4 drops of blue, 1 drop of white, 1 drop of black.
Nearest safe hex - #669966. Below you can see the block with #718b68 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #718b68 to the mixer and play with it.