Hex #555685 or rgb(85,86,133) in RGB space is the tint of violet. It has hue angle of 238.75 degrees, value = 52 and saturation = 36. #555685 can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of magenta, 5 drops of blue, 1 drop of green.
Nearest safe hex - #666699. Below you can see the block with #555685 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555685 to the mixer and play with it.