Can you use an OIII filter on a colour camera?

[Gem (Grant)]

I have noticed most people use OIII or other filters with mono cameras. Can you use an OIII filter on a colour camera? Do you then just combine the image with a normal unfiltered image?
I quite like PN and if I get a cheapish camera to start the FOV will be relatively small - so PN would be ideal targets. I am also thinking of getting an OIII filter anyway for visual observing... so I was curious as to whether colour cameras and OIII filters go together!

[riklaunim]

1. You can use it, but it won't be as effective as with mono camera.
2. Most of planetary nebulas is small, usually planet-sized or less. Small sensitive mono camera and narrowband filters (or RGB through UHC) would be very effiecient on them And you can do some experiments like imaging He, Ne or Ar bands