Hex #66726f or rgb(102,114,111) in RGB space is the tint of greenish cian. It has hue angle of 165.00 degrees, value = 45 and saturation = 11. #66726f can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of blue, 3 drops of white, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #66726f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66726f to the mixer and play with it.