Hex #2b3b8f or rgb(43,59,143) in RGB space is the tint of blue violet. It has hue angle of 230.40 degrees, value = 56 and saturation = 70. #2b3b8f can be obtained by mixing 2 colors: 1 drop of red, 5 drops of blue.
Nearest safe hex - #333399. Below you can see the block with #2b3b8f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b3b8f to the mixer and play with it.