Hex #404f60 or rgb(64,79,96) in RGB space is the tint of blue. It has hue angle of 211.88 degrees, value = 38 and saturation = 33. #404f60 can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of blue, 5 drops of green, 2 drops of black.
Nearest safe hex - #336666. Below you can see the block with #404f60 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404f60 to the mixer and play with it.