Hex #554f80 or rgb(85,79,128) in RGB space is the tint of violet. It has hue angle of 247.35 degrees, value = 50 and saturation = 38. #554f80 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 4 drops of cyan, 4 drops of black.
Nearest safe hex - #666699. Below you can see the block with #554f80 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554f80 to the mixer and play with it.