Hex #551864 or rgb(85,24,100) in RGB space is the tint of purple magenta. It has hue angle of 288.16 degrees, value = 39 and saturation = 76. #551864 can be obtained by mixing 4 colors: 1 drop of red, 3 drops of magenta, 4 drops of blue, 4 drops of black.
Nearest safe hex - #660066. Below you can see the block with #551864 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551864 to the mixer and play with it.