Hex #99b2aa or rgb(153,178,170) in RGB space is the tint of greenish cian. It has hue angle of 160.80 degrees, value = 70 and saturation = 14. #99b2aa can be obtained by mixing 3 colors: 1 drop of yellow, 2 drops of blue, 2 drops of white.
Nearest safe hex - #999999. Below you can see the block with #99b2aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99b2aa to the mixer and play with it.