Hex #6689b3 or rgb(102,137,179) in RGB space is the tint of blue. It has hue angle of 212.73 degrees, value = 70 and saturation = 43. #6689b3 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 5 drops of cyan, 1 drop of green.
Nearest safe hex - #6699cc. Below you can see the block with #6689b3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6689b3 to the mixer and play with it.