I love the idea of allowing more than one to be checked.  I can think of all kinds of movies that are mixed types.  B&W with color, B&W with some scenes tinted other colors, B&W with 2-strip technicolor, etc.

Quoting goblinsdoitall:

Quote:
OK,
now I get the idea why this isn't implemented yet.
In my eyes a full set of all possible colouring techniques wouldn't make sense (too long), especially not if combinations were allowed.

...

Man, just think of the discussions in the contribution forum: is Sin City a B/W - B/W + partially tinted - Decoloured Colour - or whatever else. This discussion might well destroy the whole internet 

My brain goes one step further. Once you track colour (or lack of), there would probably be a push to track the (I don't know if this is the correct term) "colour system". Even with my limited knowledge/appreciation of older films, I do know that some of the different systems produced vastly different colour representations. Personally, I like Metrocolor. 

Now to show my naivety some more... from my understanding, there are two factors at play. There's the film stock that the movie was shot on, and then there's who/how processed it. Is that correct? If so, it's a slippery-slope if we ever start tracking *that*!