There will be slightly different variations in color depending on collection point. They have a pretty wide distribution. I've seen photos of adults that are all yellow (no red), some have more green or blue sheens, etc.
The real issue is that you're probably not going to be able to find much in regards to certain collection locations as far as being able to buy some. You might just come across something in a local fish store that looks a bit different, but it's very likely just random aquarium strain stuff. The one collection point I've seen around is Rio Grijalva.