Sorry if this is old and over covered,

But i've just had a butchers at the new Star Wars comic in England (I don't know if you get the same one across the water) but it has a story on the origins of Darth Maul. It says that Maul was originally just Red all over but Sidious tattooed Maul because the Pain would Focus his Anger.

I was wondering if this was covered anywhere else in the EU?