No, I'm not depressed. Just looking for TRUE blue fall-blooming perennial options. I know it's a toughie!
Not really true blue but close:
Clematis 'Juuli', 'Arabella', 'Durandii'
Perovskia is quite blue.
I would go with clumps of salvia..... mine has been blooming for weeks and is really attractive.
How about a little Echinops ritro ÂVeitchÂs BlueÂ or Plumbago capensis?
The last is tender.