Hex #406580 or rgb(64,101,128) in RGB space is the tint of blue. It has hue angle of 205.31 degrees, value = 50 and saturation = 50. #406580 can be obtained by mixing 4 colors: 3 drops of blue, 1 drop of cyan, 3 drops of white, 5 drops of black.
Nearest safe hex - #336699. Below you can see the block with #406580 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406580 to the mixer and play with it.