Hex #99a9b5 or rgb(153,169,181) in RGB space is the tint of blue. It has hue angle of 205.71 degrees, value = 71 and saturation = 15. #99a9b5 can be obtained by mixing 4 colors: 4 drops of red, 1 drop of blue, 5 drops of cyan, 5 drops of white.
Nearest safe hex - #9999cc. Below you can see the block with #99a9b5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a9b5 to the mixer and play with it.