Hex #555564 or rgb(85,85,100) in RGB space is the tint of violet. It has hue angle of 240.00 degrees, value = 39 and saturation = 15. #555564 can be obtained by mixing 4 colors: 4 drops of magenta, 2 drops of cyan, 3 drops of green, 3 drops of black.
Nearest safe hex - #666666. Below you can see the block with #555564 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555564 to the mixer and play with it.