It looks fine to me. I've seen purple pot that dyes stuff purple. I have seeds that are stained black from the nug it comes from.
Don't understand why anyone would want to turn perfectly good green pot purple. Seems moronic to me. The dumbest thing I saw was a hormone to make a green plant turn purplish. Just get a purple strain, plenty of them out there.
Of course there's people that are suspicious of all purple pot, believe it's not real or you have to freeze the pot or abuse it somehow to make it purple.
Years ago I had a strain that was blackish-purple. And smelled exactly like kool aid. I was smoking with a friend who didn't know I grew it, didn't grow. He told me, like he had some insider's knowledge, that the grower waters the plants with kool aid to make it taste that way. It was very hard not to burst out laughing.
That was a strain that would dye stuff purple. You've seen all the trouble the Romans had to go through with rotten shellfish to make royal purple? Wouldn't need it with that strain.
I knew a guy who used to soak his pot in cola soda pop. He grew such crappy pot, he soaked it in soda to make it more 'crystally'. Instead of harvesting it at the right time. They were tweakers, so the stupidity wasn't surprising. If you get your pot from reputable people you can trust, don't have to worry. If it's high grade organic, don't have to worry. If you're buying your pot from sketchy dudes be very cautious.