Hex #553f9d or rgb(85,63,157) in RGB space is the tint of purple violet. It has hue angle of 254.04 degrees, value = 62 and saturation = 60. #553f9d can be obtained by mixing 4 colors: 2 drops of magenta, 2 drops of blue, 1 drop of cyan, 1 drop of black.
Nearest safe hex - #663399. Below you can see the block with #553f9d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #553f9d to the mixer and play with it.