Hex #556997 or rgb(85,105,151) in RGB space is the tint of blue violet. It has hue angle of 221.82 degrees, value = 59 and saturation = 44. #556997 can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 4 drops of cyan, 2 drops of black.
Nearest safe hex - #666699. Below you can see the block with #556997 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #556997 to the mixer and play with it.