Colour?

I think everything is ok, beautiful plants! what are you worried about? in flowering it is normal for the leaves to turn yellow and violer or red...

They all all hulk berry plans by rqs. I’ve been using biobizz top max. Bloom grow and cal mag. More worried why two plans are dark lol

i would say they are all deficiencies potassium(gold brown edges) and nitrogen (yellowing) and necrosis probably from K or Cal. you could use something like AN overdrive( used only in last 2-3 weeks before harvest) but remember you need time to flush. i wouldn't be worried if your harvesting in 2 weeks and honestly wouldn't temper with it not gonna fix the burnt leaves anyway just ride it let it fade.

Someone's gonna get canceled! LOL Well, you got soem minor interveinal chlorosis and several different things can cause that. I doubt it'll prevent a successful harvest, but good to work out the cause for the next grow and avoid it. Cannot see the buds to guesstimate how much time you have left, but canopy should be able to power it through to the end, which is important. HAve some leaf tip curling, which is a sign of overfeeding. I'd wager Mg-deficiency based on leaf symtpoms, but such a thing stars 4-6 weeks before any visible symptoms appear, so if you review how you fed it 4-6 weeks before the inerveinal chlorosis symptoms presented themselves, you might determine hat there has been plenty of Mg given, and maybe pH or nute-lockout is occuring... need some investiation to be certain. test pH, first since that;s the easiest thing to do. Could be as simple as a slight overall EC drop in fertilized water and a bump to Mg portion of the mix.

More than natural fade there with the marginal chlorosis and necrosis. Not much to do as far as course correction this late in flower. Just get to the finish line and assess what could have caused it