Hex #66a483 or rgb(102,164,131) in RGB space is the tint of teal. It has hue angle of 148.06 degrees, value = 64 and saturation = 38. #66a483 can be obtained by mixing 4 colors: 1 drop of red, 4 drops of blue, 5 drops of green, 5 drops of white.
Nearest safe hex - #669999. Below you can see the block with #66a483 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a483 to the mixer and play with it.