Hex #80999f or rgb(128,153,159) in RGB space is the tint of bluish cian. It has hue angle of 191.61 degrees, value = 62 and saturation = 19. #80999f can be obtained by mixing 4 colors: 2 drops of red, 3 drops of cyan, 2 drops of white, 1 drop of black.
Nearest safe hex - #999999. Below you can see the block with #80999f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #80999f to the mixer and play with it.