Hex #668c7d or rgb(102,140,125) in RGB space is the tint of teal. It has hue angle of 156.32 degrees, value = 55 and saturation = 27. #668c7d can be obtained by mixing 4 colors: 2 drops of red, 5 drops of blue, 4 drops of green, 4 drops of white.
Nearest safe hex - #669966. Below you can see the block with #668c7d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668c7d to the mixer and play with it.