Hex #99d399 or rgb(153,211,153) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 83 and saturation = 27. #99d399 can be obtained by mixing 4 colors: 4 drops of yellow, 4 drops of cyan, 5 drops of white, 2 drops of black.
Nearest safe hex - #99cc99. Below you can see the block with #99d399 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99d399 to the mixer and play with it.