Brown Wolverine: As a result of memory implants as part of his involvement with the weapon X program Wolverine has never really been sure if his past is truly his. Because of all those different roles Wolverine has donned many different costumes. When he originally joined the X-Men his costume was primarily yellow. In later years he switched to a brown outfit better suited to his mutant ability as a tracker and stealth operative.
Dark Magneto: While it's true for most of his adult life Magneto has been one of the most feared beings on the planet, there was a time when he was a force of good and lead the X-Men in professor Xavier's absence - this is not one of those times. During his darkest days Magneto has wanted nothing more than the annihilation of the human race.