Hex #808791 or rgb(128,135,145) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 57 and saturation = 12. #808791 can be obtained by mixing 3 colors: 1 drop of blue, 5 drops of white, 4 drops of black.
Nearest safe hex - #999999. Below you can see the block with #808791 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #808791 to the mixer and play with it.