A new TRAX line may be coming soon that would directly connect — without transfers — the University of Utah, downtown Salt Lake City and the airport. It would use existing rails without the need of new construction, aside from some minor signal work.
Story here.
And as the story states, this line existed before. They would be returning service to the original University Line that ran between Arena and University before the reconfiguration into what is now the Red Line, which is oriented south towards Jordan instead of towards downtown Salt Lake City.
My guess is that it will get its own color, with Orange, Purple, or Yellow among the top choices.