Hex #39678e or rgb(57,103,142) in RGB space is the tint of blue. It has hue angle of 207.53 degrees, value = 56 and saturation = 60. #39678e can be obtained by mixing 4 colors: 2 drops of red, 3 drops of blue, 3 drops of cyan, 1 drop of black.
Nearest safe hex - #336699. Below you can see the block with #39678e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #39678e to the mixer and play with it.