Hex #553f56 or rgb(85,63,86) in RGB space is the tint of magenta. It has hue angle of 297.39 degrees, value = 34 and saturation = 27. #553f56 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of magenta, 2 drops of blue, 2 drops of black.
Nearest safe hex - #663366. Below you can see the block with #553f56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553f56 to the mixer and play with it.