Hi
@Captain_7! This is a normal thing, this process is called "senescence", basically your plant's cells are getting old and will die as the plant is ending its maturation. This is a sign that your buds are taking nutrients in the leaves and your harvest window is getting close. Congratulations, not all the growers do a good flush and have a nice fade on their plants. To find out about your harvest window, you will need to look at the trichomes with the help of a magnifier/microscope. Clear/Transparent/Skinny trichomes mean it's too soon, Milky/Cloudy/Fat trichomes mean the harvest window is open, Amber trichomes mean the harvest window is ending, and THC is degrading. Based on your latest pictures I think you're very close to the finish line, but only you can tell, by having a daily close up inspection. Hope this will help, good luck with the last days and enjoy your harvest! 👊