Hex #99a688 or rgb(153,166,136) in RGB space is the tint of olive. It has hue angle of 86.00 degrees, value = 65 and saturation = 18. #99a688 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of red, 2 drops of magenta, 4 drops of cyan.
Nearest safe hex - #999999. Below you can see the block with #99a688 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a688 to the mixer and play with it.