Hex #66b1e6 or rgb(102,177,230) in RGB space is the tint of blue. It has hue angle of 204.84 degrees, value = 90 and saturation = 56. #66b1e6 can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 5 drops of cyan, 2 drops of white.
Nearest safe hex - #6699ff. Below you can see the block with #66b1e6 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66b1e6 to the mixer and play with it.