Hex #99abb3 or rgb(153,171,179) in RGB space is the tint of bluish cian. It has hue angle of 198.46 degrees, value = 70 and saturation = 15. #99abb3 can be obtained by mixing 3 colors: 3 drops of red, 4 drops of cyan, 3 drops of white.
Nearest safe hex - #9999cc. Below you can see the block with #99abb3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99abb3 to the mixer and play with it.