Hex #78896e or rgb(120,137,110) in RGB space is the tint of grass green. It has hue angle of 97.78 degrees, value = 54 and saturation = 20. #78896e can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of blue, 4 drops of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #78896e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78896e to the mixer and play with it.