Hex #668ebb or rgb(102,142,187) in RGB space is the tint of blue. It has hue angle of 211.76 degrees, value = 73 and saturation = 45. #668ebb can be obtained by mixing 3 colors: 1 drop of red, 1 drop of magenta, 3 drops of cyan.
Nearest safe hex - #6699cc. Below you can see the block with #668ebb color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668ebb to the mixer and play with it.