Hex #99a980 or rgb(153,169,128) in RGB space is the tint of olive. It has hue angle of 83.41 degrees, value = 66 and saturation = 24. #99a980 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of green, 5 drops of white, 3 drops of black.
Nearest safe hex - #999999. Below you can see the block with #99a980 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a980 to the mixer and play with it.