Hex #2b579d or rgb(43,87,157) in RGB space is the tint of blue. It has hue angle of 216.84 degrees, value = 62 and saturation = 73. #2b579d can be obtained by mixing 3 colors: 1 drop of red, 4 drops of blue, 1 drop of cyan.
Nearest safe hex - #336699. Below you can see the block with #2b579d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b579d to the mixer and play with it.