Hex #6688bc or rgb(102,136,188) in RGB space is the tint of blue. It has hue angle of 216.28 degrees, value = 74 and saturation = 46. #6688bc can be obtained by mixing 4 colors: 1 drop of red, 5 drops of blue, 1 drop of cyan, 3 drops of white.
Nearest safe hex - #6699cc. Below you can see the block with #6688bc color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6688bc to the mixer and play with it.