Hex #2780ab or rgb(39,128,171) in RGB space is the tint of bluish cian. It has hue angle of 199.55 degrees, value = 67 and saturation = 77. #2780ab can be obtained by mixing 4 colors: 2 drops of magenta, 5 drops of blue, 4 drops of cyan, 2 drops of green.
Nearest safe hex - #339999. Below you can see the block with #2780ab color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2780ab to the mixer and play with it.