I’m working away and my wife just sent me these pics. Plants are around 1 week from harvesting and I’m wonder if this new leaf colour is normal.
Are you still feeding them? Figured there’d be more yellow a week from harvest
Hope they finish off for you ok.
Ashame to get them so close to have the grow go bad.
Get home soon. 
Might be nute burn, couple of the pants been real sensitive from the get go, maybe not good enough run off and it’s building up
What is your runoff ppm? Should be close to 250-400 by now
I’m away right now and can’t check
It’s from cold temps in my basement I just figured out. So all good 
looks like some fert burn and pH issues (probably due to excess salts)
the cold temps r not helping, but the leaf symptoms r not from being too cool.!!
after u get home and when they need watered again do a serious flush,
use a product like Botanicare Clearex, run a few gallons of the mix thru your pots,
then a gallon of pH’d water, then 1/2 strength bloom ferts in the normal amount.
1/2 strength = 1/2 of what they were getting, not necessarily 1/2 on the directions.
then water/feed at 1/4 strength until harvest.!