Dropping tempature to turn buds purple

Me and ItsTimetolegalizeit both are growing sensi seeds purple bud Picture below and I found a thread of someone growing this and they said the buds didn't go purple because he couldn't manage to drop the Tempature so the buds are cold before harvesting/end of flowering?? Weigh in everyone please

Technically it is true that all buds are supposed to be able to turn purple , I have tried it both successfully and unsuccessfully , Inidicas seem to be more susceptible to turning colors then sativas. My skunk 1's would turn with a temp change of 15 degrees colder in the dark cycle, But while it may be pretty to have purple buds, they are less potent IMO then the same skunk 1's from the same mother in the tent that was not dark cycle temp dropped . It will also take a few weeks for it to work right, I start a week 5 and run them till week 9 and see a nice change in color

One strain that will go purple no matter what is Sannies killing fields.