I don't know. I think it might depend on the image displayed and how it looks to you.
If you are, indeed, specifically talking about the product, it might look more like a part of your article to leave it white. However, if the Amazon image is tiny, it looks like it doesn't fit the big white space.
If your products are more general, like books on the same subject you are writing about, I think it looks nicer to use the blue. It's just a personal opinion, though. Nothing scientific about this.