This is one of those canna-myths that i'm sure everyone that's ever bought from your friendly neighborhood delivery botanist, or from a grower buddy has heard plenty..
"That weed is extra dank because it's purps",
"Nah, I only smoke grapes, it's all that gets me high",
"See how it's purple? That's the strongest shit i've ever grown".
Lets learn about our wonderful friends Anthocyanins! Which in all honestly, sounds way more like something out of a Harry Potter book, than something cannabis related.. but is actually responsible for giving most purple/blue cannabis it's coloring.
I hate to be the party pooper to cache your bowl on these all too common pipe dreams, but purple weed is the same as green weed. The only true strong weed is that rainbow weed on Google.. Totally natural looking! I mean, 6ix9ine is the most natural looking human that has ever existed...or... been created? Right? No, for real.. It's like Facebook is churning out mumble rappers because you guys' zucced-a-little-too-much-berg this year... Thanks internet.. Just know, I'm blaming you specifically for this). So it only seems fit that Photoshop OG & the new growing tech we call, FaceTune yo weed holds about the same relevancy to potency, as the purple in your weed does.