Hex #66c5cc or rgb(102,197,204) in RGB space is the tint of cyan. It has hue angle of 184.12 degrees, value = 80 and saturation = 50. #66c5cc can be obtained by mixing 3 colors: 2 drops of cyan, 2 drops of white, 1 drop of black.
Nearest safe hex - #66cccc. Below you can see the block with #66c5cc color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66c5cc to the mixer and play with it.