Hex #8f99a5 or rgb(143,153,165) in RGB space is the tint of blue. It has hue angle of 212.73 degrees, value = 65 and saturation = 13. #8f99a5 can be obtained by mixing 4 colors: 5 drops of magenta, 3 drops of cyan, 4 drops of green, 4 drops of white.
Nearest safe hex - #999999. Below you can see the block with #8f99a5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #8f99a5 to the mixer and play with it.