Hex #555898 or rgb(85,88,152) in RGB space is the tint of violet. It has hue angle of 237.31 degrees, value = 60 and saturation = 44. #555898 can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of blue, 2 drops of white, 2 drops of black.
Nearest safe hex - #666699. Below you can see the block with #555898 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555898 to the mixer and play with it.