Hex #809599 or rgb(128,149,153) in RGB space is the tint of bluish cian. It has hue angle of 189.60 degrees, value = 60 and saturation = 16. #809599 can be obtained by mixing 4 colors: 1 drop of red, 2 drops of cyan, 4 drops of white, 3 drops of black.
Nearest safe hex - #999999. Below you can see the block with #809599 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #809599 to the mixer and play with it.