Hex #99a880 or rgb(153,168,128) in RGB space is the tint of olive. It has hue angle of 82.50 degrees, value = 66 and saturation = 24. #99a880 can be obtained by mixing 4 colors: 2 drops of yellow, 3 drops of red, 4 drops of cyan, 1 drop of white.
Nearest safe hex - #999999. Below you can see the block with #99a880 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a880 to the mixer and play with it.