Hex #6697aa or rgb(102,151,170) in RGB space is the tint of bluish cian. It has hue angle of 196.76 degrees, value = 67 and saturation = 40. #6697aa can be obtained by mixing 4 colors: 3 drops of red, 1 drop of blue, 5 drops of cyan, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #6697aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6697aa to the mixer and play with it.