Hex #99adb3 or rgb(153,173,179) in RGB space is the tint of bluish cian. It has hue angle of 193.85 degrees, value = 70 and saturation = 15. #99adb3 can be obtained by mixing 4 colors: 2 drops of red, 3 drops of cyan, 4 drops of white, 1 drop of black.
Nearest safe hex - #9999cc. Below you can see the block with #99adb3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99adb3 to the mixer and play with it.