Hex #403f8e or rgb(64,63,142) in RGB space is the tint of violet. It has hue angle of 240.76 degrees, value = 56 and saturation = 56. #403f8e can be obtained by mixing 4 colors: 3 drops of magenta, 4 drops of blue, 2 drops of cyan, 3 drops of black.
Nearest safe hex - #333399. Below you can see the block with #403f8e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #403f8e to the mixer and play with it.