Are they usually clones?
I know with orchids, it is pretty much the norm when mass producing named varieties.
This is 'Carolina Breeze' which, in a fit of weakness, I picked up this past week. The colors are accurate in this pic:
This particular one had flowers that were brighter than the other CB's I saw there. Interestingly [to me at any rate], it did produce a much darker orange flower on Friday. I wondered if it was because I had put it on my balconey which gets lots of sun. [With orchids, amount of light buds are exposed to can affect bloom color.] However, I noted today that it has produced another bright flower like the one above.