Hex #555a8e or rgb(85,90,142) in RGB space is the tint of violet. It has hue angle of 234.74 degrees, value = 56 and saturation = 40. #555a8e can be obtained by mixing 4 colors: 3 drops of magenta, 3 drops of blue, 1 drop of cyan, 2 drops of green.
Nearest safe hex - #666699. Below you can see the block with #555a8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555a8e to the mixer and play with it.