Hex #405464 or rgb(64,84,100) in RGB space is the tint of blue. It has hue angle of 206.67 degrees, value = 39 and saturation = 36. #405464 can be obtained by mixing 4 colors: 3 drops of magenta, 4 drops of blue, 4 drops of green, 1 drop of black.
Nearest safe hex - #336666. Below you can see the block with #405464 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405464 to the mixer and play with it.