Hex #278db1 or rgb(39,141,177) in RGB space is the tint of bluish cian. It has hue angle of 195.65 degrees, value = 69 and saturation = 78. #278db1 can be obtained by mixing 4 colors: 2 drops of magenta, 4 drops of blue, 5 drops of cyan, 2 drops of green.
Nearest safe hex - #339999. Below you can see the block with #278db1 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #278db1 to the mixer and play with it.