Deficiency? (pics)

So 2 bagseed indicas. One has progressed (on right) from purple buds to purple buds and leaves in the immediate area. To show it's not a cold issue (60's past few days) I took a pic together, as you can see the one on the left is nice and green. Is this a particular strain that looks like this or some sort of deficiency? Stopped nutes 1 week ago, flushing now. And yes, I do have a calcium deficiency, but that doesn't turn the leaves purple. Thanks in advance.

doesnt have to be cold for your plant to turn purple for one thing... some strains 90% of plants turn purple.