Correct names for filters in FITS header, etc

My camera control software places the filter name into the FITS header of images and my analysis software automatically places filter names into reports. I am not sure what the correct names or abbreviations should be. I am using the following filters:

Clear (to be parfocal)

Blue (Johnsons/Cousins)

Visual (Johnsons/Cousins)

Sloan r' 2nd generation Astrodon

Sloan g' 2nd generation Astrodon

All the photometric filters are from Astrodon.

I then have three pretty picture filters (RGB), but they won't be involved in photometry.