Hex #2b3647 or rgb(43,54,71) in RGB space is the tint of blue. It has hue angle of 216.43 degrees, value = 28 and saturation = 39. #2b3647 can be obtained by mixing 3 colors: 1 drop of blue, 1 drop of white, 4 drops of black.
Nearest safe hex - #333333. Below you can see the block with #2b3647 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b3647 to the mixer and play with it.