Hex #66a280 or rgb(102,162,128) in RGB space is the tint of teal. It has hue angle of 146.00 degrees, value = 64 and saturation = 37. #66a280 can be obtained by mixing 4 colors: 1 drop of cyan, 2 drops of green, 4 drops of white, 3 drops of black.
Nearest safe hex - #669999. Below you can see the block with #66a280 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a280 to the mixer and play with it.