Hex #66be99 or rgb(102,190,153) in RGB space is the tint of teal. It has hue angle of 154.77 degrees, value = 75 and saturation = 46. #66be99 can be obtained by mixing 3 colors: 1 drop of yellow, 1 drop of red, 3 drops of cyan.
Nearest safe hex - #66cc99. Below you can see the block with #66be99 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66be99 to the mixer and play with it.