design – Why did Microsoft choose a blue accent for the Visual Studio dark theme?

As I was designing my own dark ui, I randomly thought of a simple question. Why did Microsoft choose blue for the dark theme of visual studio? Was this on some level a personal choice that someone in the team randomly made? Or was there some sort of research that had been done in selecting that very specific hue of blue? Is it the easiest color on the eyes? Or is there some other arbitrary reasoning behind it? Has anyone on the team ever spoken about this?