Hex #66b2aa or rgb(102,178,170) in RGB space is the tint of cyan. It has hue angle of 173.68 degrees, value = 70 and saturation = 43. #66b2aa can be obtained by mixing 4 colors: 3 drops of magenta, 5 drops of cyan, 4 drops of green, 3 drops of white.
Nearest safe hex - #669999. Below you can see the block with #66b2aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66b2aa to the mixer and play with it.