Hex #276c8a or rgb(39,108,138) in RGB space is the tint of bluish cian. It has hue angle of 198.18 degrees, value = 54 and saturation = 72. #276c8a can be obtained by mixing 4 colors: 2 drops of red, 3 drops of blue, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #336699. Below you can see the block with #276c8a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #276c8a to the mixer and play with it.