Hex #556072 or rgb(85,96,114) in RGB space is the tint of blue. It has hue angle of 217.24 degrees, value = 45 and saturation = 25. #556072 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of blue, 2 drops of cyan, 1 drop of green.
Nearest safe hex - #666666. Below you can see the block with #556072 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556072 to the mixer and play with it.