Hex #99d288 or rgb(153,210,136) in RGB space is the tint of grass green. It has hue angle of 106.22 degrees, value = 82 and saturation = 35. #99d288 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of cyan, 4 drops of white, 2 drops of black.
Nearest safe hex - #99cc99. Below you can see the block with #99d288 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99d288 to the mixer and play with it.