Question about Sarracenia colors

[bystander]

Greetings
When do sarracenias show some red coloration (at least the varieties that can)? Is it adequate sunlight or lack of phosphorus (as one source found google claimed)? Can someone explain to me the whole process in greater detail or refer me to some sources?
Thanks

[coline]

As I have seen here, if less light is available, they first start not getting the full red they have, then the leaves start to loose the trap space as each new one appears until they are only flat green leaves. it reverts with only sunlight, nothing added.

[hcarlton]

Those Sarracenia that are meant to produce anthocyanin (the red and purple pigmentation) produce it due to genetic coding to do so and proper lighting to produce the pigments, or as a protection in instances of leaf injury.

[bystander]

Oh wow, thanks guys!