I can’t get a good look at this plaid. It looks almost gold and purple on the interior shot, but then looks a bit blue on the exterior shot. One thing that I can tell is that it’s a very dense pattern of plaid. The plaid the runs up the button strip runs on an angle to the rest, as does the plaid on the shoulders.
In Southern Comfort (8x06), Sam wears this plaid at the end of the episode when he is thinking of Amelia and then arguing with Dean in the parking lot.