Hex #78a978 or rgb(120,169,120) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 66 and saturation = 29. #78a978 can be obtained by mixing 4 colors: 4 drops of red, 4 drops of cyan, 5 drops of green, 4 drops of white.
Nearest safe hex - #669966. Below you can see the block with #78a978 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78a978 to the mixer and play with it.