Hex #404a56 or rgb(64,74,86) in RGB space is the tint of blue. It has hue angle of 212.73 degrees, value = 34 and saturation = 26. #404a56 can be obtained by mixing 4 colors: 4 drops of magenta, 4 drops of blue, 5 drops of green, 3 drops of black.
Nearest safe hex - #333366. Below you can see the block with #404a56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404a56 to the mixer and play with it.