They look excellent!! They look really good, that yellowing is normal at the end of flowering. The fact that some are completely green and others are yellowing is because each plant is unique and has reacted differently to the fertilizers. The yellowing one is consuming energy from its leaves to direct it to the buds, but don’t worry! It’s completely normal, they look amazing!
I would harvest in 1 or 2 weeks, so if you’re using mineral fertilizers, I think it’s time to just use water until harvest. If you’re using organic fertilizers, it’s not necessary, but I still do a root wash the last week before harvesting to clean everything! Great job with those plants!