I've seen black & white photos from WWII being colourized somehow..
Theres some pic I know for sure being black & white originally, but some peeps have given those colours with adobe photoshop.
I don't know the program functions, what could do that, but those pics were quite impressive.
With a quick or even longer glance, you wouldn't have known those were colorized B/W photos after the treatment.
I forgot about it.. would be neat to know how they do it.