Hex #405779 or rgb(64,87,121) in RGB space is the tint of blue. It has hue angle of 215.79 degrees, value = 47 and saturation = 47. #405779 can be obtained by mixing 3 colors: 4 drops of blue, 3 drops of white, 5 drops of black.
Nearest safe hex - #336666. Below you can see the block with #405779 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405779 to the mixer and play with it.