According to International Business Times, French fast food chain Quick is harnessing “the force” with its new Darth Vader burger, complete with a black bun. The menu item was created in honor of the upcoming release of Star Wars 1: The Phantom Menace 3D.
In addition to the Vader, burger, Quick is also featuring the Dark Burger, a tribute to Darth Maul which features a red-colored bun and the Jedi Burger in honor of Yoda which includes white mozzarella cheese cubes underneath the top bun.
foodmanufacturing 
I seriously think this is terrible marketing. Most people associate the color ‘black’ with a bun that was burned; ie. left on the grill too long. It’s not associated with a good tasting hamburger. Just my two cents.