Hex #6687a2 or rgb(102,135,162) in RGB space is the tint of blue. It has hue angle of 207.00 degrees, value = 64 and saturation = 37. #6687a2 can be obtained by mixing 4 colors: 3 drops of red, 2 drops of blue, 4 drops of cyan, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #6687a2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6687a2 to the mixer and play with it.