RORY: What about colours? Did you pick your colours yet?
LORELAI: Yes.
RORY: Really? What?
LORELAI: Spumoni.
Spumoni is an Italian moulded gelato dish with layers of different colours and flavours – traditionally cherry, pistachio, and chocolate. So Lorelai is jokingly saying her wedding colours will be pink, green, and brown; Rory isn’t impressed.
The Annotated Gilmore Girls 