Hex #405770 or rgb(64,87,112) in RGB space is the tint of blue. It has hue angle of 211.25 degrees, value = 44 and saturation = 43. #405770 can be obtained by mixing 4 colors: 4 drops of red, 3 drops of blue, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #405770 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405770 to the mixer and play with it.