Let me guess..... You've been flushing it? And as a result it looks like this. Pretty it finish, it a almost done. Skip the flush next time, it's impossible to flush nutrients out of your buds. It's about as legit as finding a unicorn.
I wouldn't worry about it. She is getting ready for harvest. I would start flushing her out now and stop all feeding, water and flush only now. You should also be checking her trichomes to see just how close she really is to harvest.