The seats at Rogers Place are black. You're probably thinking of opening night when most had an orange t-shirt on them.
As an Oilers fan I'm glad they are switching. I wasn't born until after the third Cup, so I don't remember much from the dynasty days. I associate the blue jerseys with the first playoff drought from 1993-96, the beginning of bad times in 2008 when it returned as an alternate, two spectacularly botched rebuilds, and putrid hockey from 2010 until last season. I do like the aways, however.