Hex #555464 or rgb(85,84,100) in RGB space is the tint of violet. It has hue angle of 243.75 degrees, value = 39 and saturation = 16. #555464 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 4 drops of blue, 4 drops of green.
Nearest safe hex - #666666. Below you can see the block with #555464 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555464 to the mixer and play with it.