Hex #66a680 or rgb(102,166,128) in RGB space is the tint of teal. It has hue angle of 144.38 degrees, value = 65 and saturation = 39. #66a680 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of red, 5 drops of cyan, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #66a680 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a680 to the mixer and play with it.