Hex #66a0bb or rgb(102,160,187) in RGB space is the tint of bluish cian. It has hue angle of 199.06 degrees, value = 73 and saturation = 45. #66a0bb can be obtained by mixing 4 colors: 1 drop of red, 1 drop of blue, 2 drops of cyan, 1 drop of white.
Nearest safe hex - #6699cc. Below you can see the block with #66a0bb color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66a0bb to the mixer and play with it.