Hex #66a6a2 or rgb(102,166,162) in RGB space is the tint of cyan. It has hue angle of 176.25 degrees, value = 65 and saturation = 39. #66a6a2 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of magenta, 5 drops of cyan, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #66a6a2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a6a2 to the mixer and play with it.