Hex #406b8a or rgb(64,107,138) in RGB space is the tint of blue. It has hue angle of 205.14 degrees, value = 54 and saturation = 54. #406b8a can be obtained by mixing 4 colors: 2 drops of red, 2 drops of blue, 3 drops of cyan, 1 drop of black.
Nearest safe hex - #336699. Below you can see the block with #406b8a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406b8a to the mixer and play with it.