Hex #99a988 or rgb(153,169,136) in RGB space is the tint of olive. It has hue angle of 89.09 degrees, value = 66 and saturation = 20. #99a988 can be obtained by mixing 4 colors: 4 drops of red, 3 drops of cyan, 3 drops of green, 5 drops of white.
Nearest safe hex - #999999. Below you can see the block with #99a988 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a988 to the mixer and play with it.