Hex #555279 or rgb(85,82,121) in RGB space is the tint of violet. It has hue angle of 244.62 degrees, value = 47 and saturation = 32. #555279 can be obtained by mixing 4 colors: 1 drop of magenta, 3 drops of blue, 3 drops of white, 5 drops of black.
Nearest safe hex - #666666. Below you can see the block with #555279 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555279 to the mixer and play with it.