Haze Berry (fem. ; RQS)

Yes normal.

Alot of gentics will turn plants purple. Although of you give your plants to much nitrogen durring late flower the begging of nitrogen damage makes the leaves change colors. You can tell the difference because gentics the whole leaf will change colors together. If you look at your leaves you will see the colors starting almost like lines thru the ridges thru the leaves and then spreading out. I wouldn't worry about this. Most likely you just gave to much cal mag or something with alot of nitrogen on top of a flowering

Agree with the others. Temps

cold temps or genetics... as normal as autumn colors outside and caused by the same things. 68F and below can do it. Is it worth to avoid with greater expense on heating? I can't say, but based on experience and others' grows, seems inconsequential to the human eye. And, the ones that genetically produce exotic colors near may happen regardless of temperatures, not entirely sure on that either. maybe they are just more prone to it under normal circumstances.

yes, fade or genetics, maybe both.