Hex #667d6f or rgb(102,125,111) in RGB space is the tint of teal. It has hue angle of 143.48 degrees, value = 49 and saturation = 18. #667d6f can be obtained by mixing 4 colors: 2 drops of red, 2 drops of magenta, 3 drops of cyan, 3 drops of green.
Nearest safe hex - #666666. Below you can see the block with #667d6f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667d6f to the mixer and play with it.