Hex #879db4 or rgb(135,157,180) in RGB space is the tint of blue. It has hue angle of 210.67 degrees, value = 71 and saturation = 25. #879db4 can be obtained by mixing 4 colors: 4 drops of red, 3 drops of blue, 5 drops of cyan, 5 drops of white.
Nearest safe hex - #9999cc. Below you can see the block with #879db4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #879db4 to the mixer and play with it.