Hex #66a480 or rgb(102,164,128) in RGB space is the tint of teal. It has hue angle of 145.16 degrees, value = 64 and saturation = 38. #66a480 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of red, 3 drops of blue, 3 drops of cyan.
Nearest safe hex - #669999. Below you can see the block with #66a480 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a480 to the mixer and play with it.