Hex #99b0aa or rgb(153,176,170) in RGB space is the tint of greenish cian. It has hue angle of 164.35 degrees, value = 69 and saturation = 13. #99b0aa can be obtained by mixing 4 colors: 4 drops of red, 5 drops of cyan, 1 drop of green, 5 drops of white.
Nearest safe hex - #999999. Below you can see the block with #99b0aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99b0aa to the mixer and play with it.