Hex #809d9f or rgb(128,157,159) in RGB space is the tint of cyan. It has hue angle of 183.87 degrees, value = 62 and saturation = 19. #809d9f can be obtained by mixing 3 colors: 1 drop of cyan, 4 drops of white, 3 drops of black.
Nearest safe hex - #999999. Below you can see the block with #809d9f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #809d9f to the mixer and play with it.