Hex #278990 or rgb(39,137,144) in RGB space is the tint of cyan. It has hue angle of 184.00 degrees, value = 56 and saturation = 73. #278990 can be obtained by mixing 4 colors: 2 drops of yellow, 5 drops of blue, 4 drops of cyan, 2 drops of black.
Nearest safe hex - #339999. Below you can see the block with #278990 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #278990 to the mixer and play with it.