Hex #66a0dd or rgb(102,160,221) in RGB space is the tint of blue. It has hue angle of 210.76 degrees, value = 87 and saturation = 54. #66a0dd can be obtained by mixing 4 colors: 1 drop of magenta, 1 drop of blue, 2 drops of cyan, 1 drop of white.
Nearest safe hex - #6699cc. Below you can see the block with #66a0dd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a0dd to the mixer and play with it.