Hex #55577d or rgb(85,87,125) in RGB space is the tint of violet. It has hue angle of 237.00 degrees, value = 49 and saturation = 32. #55577d can be obtained by mixing 4 colors: 5 drops of magenta, 4 drops of cyan, 2 drops of green, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #55577d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55577d to the mixer and play with it.