BC God Bud Leaves, ever seen this?

I have some BC God Bud growing and today I noticed that the leaves are turning red. None of my others are doing it. This is my first time growing this strain so my question is, do the leaves of God bud turn red near the end of their cycle? They only have 24 days left.

I am using Fox Farm Ocean Forrest soil and I added some mexican bat guano to the soil when they were transplanted into the big pots. I dose with blackstrap unsulpherd molasses every feeding now that they are mature, every other when still using fox farm tiger bloom, TB stopped when they had 4 weeks left in flower. dosage is 1/2 teaspoon pure molasses to one gallon ph'd water. My PH is always 6.4. I use vinegar for ph down and baking soda for ph up. My soil was also dosed with dolomite lime at the beginning. I did not add perlite to the soil. Temp is a consistent 66-74ºF, humidity is 40-52% stable. Please see pics below and let me know your thoughts. Thanks for your opinion.

It looks like it's expressing some purpley phenotypes. These were grown from seed, I assume?

No they were clones. Sorry, I should have stated that. I guess it turns out that the cooler the weather is, the more red or "purple" color traits will show up. I recently moved the whole grow into the garage. It is way cooler in there and gets down into the 50's. It sure is an odiferous strain. Excellent smoke at night!! Peace.

i have a strain like this at the moment G!3 labs Blue OG(2 weeks in)