Tartan ID-> Black and Blue

[adam]

By the way, I have looked and looked, but found nothing. Though, as this forum is SO good at IDing the odd and unusual tartans, I would make one final effort before I assume (you know the rhyme) a "new" name for it.
Right now, I call it the "Batman Tartan."

But if it was the "Batman Tartan", wouldn't it have a yellow stripe somewhere?