Hex #555499 or rgb(85,84,153) in RGB space is the tint of violet. It has hue angle of 240.87 degrees, value = 60 and saturation = 45. #555499 can be obtained by mixing 4 colors: 5 drops of magenta, 1 drop of blue, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #666699. Below you can see the block with #555499 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555499 to the mixer and play with it.