Hex #809999 or rgb(128,153,153) in RGB space is the tint of cyan. It has hue angle of 180.00 degrees, value = 60 and saturation = 16. #809999 can be obtained by mixing 4 colors: 3 drops of magenta, 2 drops of cyan, 3 drops of green, 2 drops of white.
Nearest safe hex - #999999. Below you can see the block with #809999 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #809999 to the mixer and play with it.