Hex #99c380 or rgb(153,195,128) in RGB space is the tint of grass green. It has hue angle of 97.61 degrees, value = 76 and saturation = 34. #99c380 can be obtained by mixing 4 colors: 3 drops of yellow, 2 drops of cyan, 3 drops of white, 2 drops of black.
Nearest safe hex - #99cc99. Below you can see the block with #99c380 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99c380 to the mixer and play with it.