Hex #555bab or rgb(85,91,171) in RGB space is the tint of violet. It has hue angle of 235.81 degrees, value = 67 and saturation = 50. #555bab can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 2 drops of cyan, 1 drop of black.
Nearest safe hex - #666699. Below you can see the block with #555bab color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555bab to the mixer and play with it.