Hex #276790 or rgb(39,103,144) in RGB space is the tint of blue. It has hue angle of 203.43 degrees, value = 56 and saturation = 73. #276790 can be obtained by mixing 4 colors: 5 drops of blue, 2 drops of cyan, 2 drops of white, 4 drops of black.
Nearest safe hex - #336699. Below you can see the block with #276790 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #276790 to the mixer and play with it.