Hex #156280 or rgb(21,98,128) in RGB space is the tint of bluish cian. It has hue angle of 196.82 degrees, value = 50 and saturation = 84. #156280 can be obtained by mixing 4 colors: 3 drops of blue, 3 drops of cyan, 1 drop of white, 5 drops of black.
Nearest safe hex - #006699. Below you can see the block with #156280 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #156280 to the mixer and play with it.