Usually a "color copy background" means it is a 
color photocopy of a normal painted background.  
It doesn't necessarily mean it's matching but 
sometimes it is.  :)  It can still stick to the 
cel though since it is paper, so it should 
probably be kept separate.  Depending on the inks 
used, it can be more damaging than a painted one.

Sometimes you might see the term "laser 
background."  Sometimes people just mean color 
copy by this, but sometimes they mean that the 
actual production background happened to be 
printed out.

Keys