Hex #552798 or rgb(85,39,152) in RGB space is the tint of purple. It has hue angle of 264.42 degrees, value = 60 and saturation = 74. #552798 can be obtained by mixing 3 colors: 3 drops of magenta, 5 drops of blue, 1 drop of black.
Nearest safe hex - #663399. Below you can see the block with #552798 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #552798 to the mixer and play with it.