Hex #66d199 or rgb(102,209,153) in RGB space is the tint of teal. It has hue angle of 148.60 degrees, value = 82 and saturation = 51. #66d199 can be obtained by mixing 4 colors: 1 drop of red, 4 drops of cyan, 5 drops of green, 5 drops of white.
Nearest safe hex - #66cc99. Below you can see the block with #66d199 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66d199 to the mixer and play with it.