Hex #551e56 or rgb(85,30,86) in RGB space is the tint of magenta. It has hue angle of 298.93 degrees, value = 34 and saturation = 65. #551e56 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of magenta, 5 drops of blue, 3 drops of black.
Nearest safe hex - #663366. Below you can see the block with #551e56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #551e56 to the mixer and play with it.