Hex #5557a1 or rgb(85,87,161) in RGB space is the tint of violet. It has hue angle of 238.42 degrees, value = 63 and saturation = 47. #5557a1 can be obtained by mixing 4 colors: 3 drops of magenta, 1 drop of blue, 3 drops of cyan, 2 drops of black.
Nearest safe hex - #666699. Below you can see the block with #5557a1 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5557a1 to the mixer and play with it.