Hex #2b5772 or rgb(43,87,114) in RGB space is the tint of blue. It has hue angle of 202.82 degrees, value = 45 and saturation = 62. #2b5772 can be obtained by mixing 3 colors: 1 drop of yellow, 4 drops of blue, 1 drop of black.
Nearest safe hex - #336666. Below you can see the block with #2b5772 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b5772 to the mixer and play with it.