Hex #66c3dd or rgb(102,195,221) in RGB space is the tint of bluish cian. It has hue angle of 193.11 degrees, value = 87 and saturation = 54. #66c3dd can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of cyan, 3 drops of white, 1 drop of black.
Nearest safe hex - #66cccc. Below you can see the block with #66c3dd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66c3dd to the mixer and play with it.