Hex #66bcd5 or rgb(102,188,213) in RGB space is the tint of bluish cian. It has hue angle of 193.51 degrees, value = 84 and saturation = 52. #66bcd5 can be obtained by mixing 4 colors: 2 drops of magenta, 5 drops of cyan, 1 drop of green, 2 drops of white.
Nearest safe hex - #66cccc. Below you can see the block with #66bcd5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66bcd5 to the mixer and play with it.