Hex #66b7b3 or rgb(102,183,179) in RGB space is the tint of cyan. It has hue angle of 177.04 degrees, value = 72 and saturation = 44. #66b7b3 can be obtained by mixing 4 colors: 3 drops of blue, 1 drop of cyan, 2 drops of green, 4 drops of white.
Nearest safe hex - #66cccc. Below you can see the block with #66b7b3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66b7b3 to the mixer and play with it.