Hex #8fa3b5 or rgb(143,163,181) in RGB space is the tint of blue. It has hue angle of 208.42 degrees, value = 71 and saturation = 21. #8fa3b5 can be obtained by mixing 4 colors: 4 drops of red, 2 drops of blue, 5 drops of cyan, 5 drops of white.
Nearest safe hex - #9999cc. Below you can see the block with #8fa3b5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #8fa3b5 to the mixer and play with it.