Hex #99c888 or rgb(153,200,136) in RGB space is the tint of grass green. It has hue angle of 104.06 degrees, value = 78 and saturation = 32. #99c888 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 1 drop of green, 2 drops of white.
Nearest safe hex - #99cc99. Below you can see the block with #99c888 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99c888 to the mixer and play with it.