Hex #667772 or rgb(102,119,114) in RGB space is the tint of greenish cian. It has hue angle of 162.35 degrees, value = 47 and saturation = 14. #667772 can be obtained by mixing 4 colors: 2 drops of yellow, 4 drops of blue, 4 drops of white, 5 drops of black.
Nearest safe hex - #666666. Below you can see the block with #667772 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667772 to the mixer and play with it.