Hex #78aa69 or rgb(120,170,105) in RGB space is the tint of grass green. It has hue angle of 106.15 degrees, value = 67 and saturation = 38. #78aa69 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 3 drops of white, 5 drops of black.
Nearest safe hex - #669966. Below you can see the block with #78aa69 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78aa69 to the mixer and play with it.