Hex #99a399 or rgb(153,163,153) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 64 and saturation = 6. #99a399 can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 3 drops of green, 4 drops of white.
Nearest safe hex - #999999. Below you can see the block with #99a399 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a399 to the mixer and play with it.