Hex #667c66 or rgb(102,124,102) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 49 and saturation = 18. #667c66 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of magenta, 4 drops of cyan, 5 drops of green.
Nearest safe hex - #666666. Below you can see the block with #667c66 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667c66 to the mixer and play with it.