Quick general question on FLVs:

When shooting video that will end up as an FLV, does the use of colors effect
the compression and size of the final FLV?

Here's an extreme "for example" :

Shoot an interview, fully lit, with a lot of background/foreground color
showing
or
Shoot a silhouette with just a one color background

Since the silhouette would yield less color, and less color change noise,
would Flash compensate for this while compressing?

Just a question that's been eating at me as I do projects.

Thanks for any ideas!