Hex #5b6774 or rgb(91,103,116) in RGB space is the tint of blue. It has hue angle of 211.20 degrees, value = 45 and saturation = 22. #5b6774 can be obtained by mixing 4 colors: 4 drops of magenta, 4 drops of blue, 5 drops of green, 1 drop of white.
Nearest safe hex - #666666. Below you can see the block with #5b6774 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b6774 to the mixer and play with it.