Hex #78b25f or rgb(120,178,95) in RGB space is the tint of grass green. It has hue angle of 101.93 degrees, value = 70 and saturation = 47. #78b25f can be obtained by mixing 4 colors: 5 drops of yellow, 5 drops of blue, 4 drops of green, 3 drops of white.
Nearest safe hex - #669966. Below you can see the block with #78b25f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78b25f to the mixer and play with it.