Hex #333989 or rgb(51,57,137) in RGB space is the tint of violet. It has hue angle of 235.81 degrees, value = 54 and saturation = 63. #333989 can be obtained by mixing 2 colors: 1 drop of red, 4 drops of blue.
Nearest safe hex - #333399. Below you can see the block with #333989 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #333989 to the mixer and play with it.