Hex #99a7bb or rgb(153,167,187) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 73 and saturation = 18. #99a7bb can be obtained by mixing 3 colors: 1 drop of blue, 3 drops of white, 1 drop of black.
Nearest safe hex - #9999cc. Below you can see the block with #99a7bb color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99a7bb to the mixer and play with it.