Hex #40789c or rgb(64,120,156) in RGB space is the tint of blue. It has hue angle of 203.48 degrees, value = 61 and saturation = 59. #40789c can be obtained by mixing 4 colors: 2 drops of magenta, 5 drops of cyan, 1 drop of white, 4 drops of black.
Nearest safe hex - #336699. Below you can see the block with #40789c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #40789c to the mixer and play with it.