Hex #55586c or rgb(85,88,108) in RGB space is the tint of blue violet. It has hue angle of 232.17 degrees, value = 42 and saturation = 21. #55586c can be obtained by mixing 4 colors: 5 drops of red, 2 drops of blue, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #666666. Below you can see the block with #55586c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55586c to the mixer and play with it.