Hex #2b4e80 or rgb(43,78,128) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 50 and saturation = 66. #2b4e80 can be obtained by mixing 3 colors: 3 drops of blue, 1 drop of white, 2 drops of black.
Nearest safe hex - #336699. Below you can see the block with #2b4e80 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b4e80 to the mixer and play with it.