Hex #66c399 or rgb(102,195,153) in RGB space is the tint of teal. It has hue angle of 152.90 degrees, value = 76 and saturation = 48. #66c399 can be obtained by mixing 4 colors: 2 drops of red, 5 drops of cyan, 4 drops of green, 4 drops of white.
Nearest safe hex - #66cc99. Below you can see the block with #66c399 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66c399 to the mixer and play with it.