Hex #404955 or rgb(64,73,85) in RGB space is the tint of blue. It has hue angle of 214.29 degrees, value = 33 and saturation = 25. #404955 can be obtained by mixing 3 colors: 1 drop of blue, 2 drops of white, 5 drops of black.
Nearest safe hex - #333366. Below you can see the block with #404955 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404955 to the mixer and play with it.