Hex #278896 or rgb(39,136,150) in RGB space is the tint of bluish cian. It has hue angle of 187.57 degrees, value = 59 and saturation = 74. #278896 can be obtained by mixing 4 colors: 1 drop of blue, 5 drops of cyan, 2 drops of white, 5 drops of black.
Nearest safe hex - #339999. Below you can see the block with #278896 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #278896 to the mixer and play with it.