Joan wears exclusively blue or green this episode. I always associate green with power on Joan, and the back-alley ways she goes about getting it, whereas I think of blue as kind of a sad color for her.
As she moves in the new hires to their offices, she wears a very flattering cobalt suit with a crazy printed shirt underneath. It’s in this outfit she experiences the pains of her ovarian cyst and is taken to the hospital by Bob. She adds a green raincoat for her hospital trip.
After returning home she’s wearing a beige robe with blue flowers on it, and later in the office she wears a green vest-and-blouse combo with one of her sculptural gold pins. She’s back in charge and saving Bob’s job.