I have no idea if this thread will be revived, but I'm actually a bit of a believer that the shirt is a very pinkish red. The first movie shirt was definitely light burgundy, but as you can see in this photo, in very bright but albeit natural light, it has a prominent pinkish hue to it:
View attachment 806177
And even in darker and neutral interior lights, you can see it retains a bit of the pink:
View attachment 806181View attachment 806182
The closest things I found was the Hanes (thanks for the spark on the "crew shirt brand", Roland!) ComfortBlend in "heather red":
https://www.hanes.com/shop/hanes/men/t-shirts/short-sleeve/hanes-mens-t-shirt-h5170 , and Gildan in both "antique cherry red" or heliconia:
https://www.mygildan.com/store/browse/productDetailsPage.jsp?productId=5000 . When I get my shah safari (or Max Cady) checkered shirt I'm snatching one of those 3 up.
Thoughts on the pinkish hue for the BTTF 2 shirt?