Hex #809399 or rgb(128,147,153) in RGB space is the tint of bluish cian. It has hue angle of 194.40 degrees, value = 60 and saturation = 16. #809399 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of blue, 4 drops of white, 2 drops of black.
Nearest safe hex - #999999. Below you can see the block with #809399 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #809399 to the mixer and play with it.