Hex #404c8b or rgb(64,76,139) in RGB space is the tint of blue violet. It has hue angle of 230.40 degrees, value = 55 and saturation = 54. #404c8b can be obtained by mixing 4 colors: 1 drop of red, 5 drops of blue, 1 drop of white, 1 drop of black.
Nearest safe hex - #333399. Below you can see the block with #404c8b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404c8b to the mixer and play with it.