Alien OG, OG Kush, Rosetta Stone and Mot

Hard to say much without more info, but I would say that could either be needing a small adjustement on the PH, or what I think is that she's just asking you for a little bit more of nuts, mostly K I would say. So give her a watering with some nutrients rich in Potassium and see that gets worse, if it does try flushing because you could have some nut lock. But for what I see it's not something very progressed so you can still fix that, and you probably only have like two more weeks to go (:

Not a thing to worry about new grow is always light green until it gets a bit bigger and fills with chlorophyll as far as the dark leaves you're fine as well they look super health, purple stocks is also normal for some strains unless it really really gets purple I wouldn't worry about it....Happy growing they look awesome..