Hex #99a488 or rgb(153,164,136) in RGB space is the tint of olive. It has hue angle of 83.57 degrees, value = 64 and saturation = 17. #99a488 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 2 drops of white, 1 drop of black.
Nearest safe hex - #999999. Below you can see the block with #99a488 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a488 to the mixer and play with it.