Hex #80918c or rgb(128,145,140) in RGB space is the tint of greenish cian. It has hue angle of 162.35 degrees, value = 57 and saturation = 12. #80918c can be obtained by mixing 4 colors: 2 drops of yellow, 4 drops of blue, 5 drops of white, 3 drops of black.
Nearest safe hex - #999999. Below you can see the block with #80918c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80918c to the mixer and play with it.