Hex #2b4b56 or rgb(43,75,86) in RGB space is the tint of bluish cian. It has hue angle of 195.35 degrees, value = 34 and saturation = 50. #2b4b56 can be obtained by mixing 3 colors: 1 drop of yellow, 3 drops of blue, 2 drops of black.
Nearest safe hex - #333366. Below you can see the block with #2b4b56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b4b56 to the mixer and play with it.