Hex #667d67 or rgb(102,125,103) in RGB space is the tint of green. It has hue angle of 122.61 degrees, value = 49 and saturation = 18. #667d67 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 5 drops of blue, 1 drop of green.
Nearest safe hex - #666666. Below you can see the block with #667d67 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667d67 to the mixer and play with it.