Hex #2b678e or rgb(43,103,142) in RGB space is the tint of blue. It has hue angle of 203.64 degrees, value = 56 and saturation = 70. #2b678e can be obtained by mixing 4 colors: 1 drop of red, 2 drops of blue, 2 drops of cyan, 1 drop of black.
Nearest safe hex - #336699. Below you can see the block with #2b678e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b678e to the mixer and play with it.