Hex #554f8e or rgb(85,79,142) in RGB space is the tint of violet. It has hue angle of 245.71 degrees, value = 56 and saturation = 44. #554f8e can be obtained by mixing 3 colors: 1 drop of magenta, 1 drop of cyan, 1 drop of black.
Nearest safe hex - #666699. Below you can see the block with #554f8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554f8e to the mixer and play with it.