Hex #768690 or rgb(118,134,144) in RGB space is the tint of blue. It has hue angle of 203.08 degrees, value = 56 and saturation = 18. #768690 can be obtained by mixing 4 colors: 2 drops of red, 5 drops of blue, 2 drops of green, 4 drops of white.
Nearest safe hex - #669999. Below you can see the block with #768690 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #768690 to the mixer and play with it.