Hex #80c666 or rgb(128,198,102) in RGB space is the tint of grass green. It has hue angle of 103.75 degrees, value = 78 and saturation = 48. #80c666 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of green, 4 drops of white, 1 drop of black.
Nearest safe hex - #99cc66. Below you can see the block with #80c666 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80c666 to the mixer and play with it.