Hex #80de4d or rgb(128,222,77) in RGB space is the tint of grass green. It has hue angle of 98.90 degrees, value = 87 and saturation = 65. #80de4d can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of cyan, 3 drops of green, 1 drop of white.
Nearest safe hex - #99cc66. Below you can see the block with #80de4d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80de4d to the mixer and play with it.