I think back in the day Florida kings entering the pet trade came from more different areas (like Paynes Prairie, Tampa Bay, Jacksonville, etc...) than they do today (just the canefields). Some areas around Tampa Bay were known to have kings with real strong yellow coloration, but most of these areas are either developed, or off-limits, or devoid of kings at this point. Canefields kings can have a rich brown, but most don't have anything you can really call "yellow" on them. I've only caught one adult out there that had a strong yellow coloration in it's crossbands. It may still be in the collection of a friend. I'll see if I can get a picture of it at some point.