Hex #156dab or rgb(21,109,171) in RGB space is the tint of blue. It has hue angle of 204.80 degrees, value = 67 and saturation = 88. #156dab can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 4 drops of cyan, 2 drops of black.
Nearest safe hex - #006699. Below you can see the block with #156dab color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #156dab to the mixer and play with it.