Hex #80dd5b or rgb(128,221,91) in RGB space is the tint of grass green. It has hue angle of 102.92 degrees, value = 87 and saturation = 59. #80dd5b can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of cyan, 5 drops of green, 3 drops of white.
Nearest safe hex - #99cc66. Below you can see the block with #80dd5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80dd5b to the mixer and play with it.