Hex #551872 or rgb(85,24,114) in RGB space is the tint of purple magenta. It has hue angle of 280.67 degrees, value = 45 and saturation = 79. #551872 can be obtained by mixing 3 colors: 1 drop of magenta, 1 drop of blue, 1 drop of black.
Nearest safe hex - #660066. Below you can see the block with #551872 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551872 to the mixer and play with it.