I think they're black.
What color do they look to you?
The science of perception helps illustrate my point about perspective and consensus. I can't emphasize enough that each individual's interpretation of the geography passages of the Book of Mormon are determined largely by the individual's own background.
If you've been raised your entire life to picture Book of Mormon events in Central America, it will be very difficult for you to "see" a new concept. This is even more true if you've read (or written) extensively on the topic.
One of the most obvious manifestations of this phenomenon is the "finding" of "correspondences" between the Book of Mormon text and Mayan culture. These are completely illusory; similar "correspondences" can be found in virtually every human culture.
IOW, if you're predisposed to believe in the Mesoamerican setting, and especially if you've made a career out of promoting it, you will find it very difficult to see the Book of Mormon in a different setting.
Go back to those chess pieces. Do they still look black? They should.
If it was possible, I would show another person the following image and ask what color they chess pieces are. You already think they are black; the other person would think they are white. Yet they are the same in every way.
If you isolate the pieces, you will see they are identical. They are neither black nor white. They are random shades of grey. This is apparent only if you put them on a solid background.
That's why I propose a solid background, based on modern revelation and the teachings of Joseph Smith and Oliver Cowdery. If everyone would use that background, the geography of the Book of Mormon would become apparent and we'd reach consensus.
Here's an abstract from Nature magazine that points out the significance of backgrounds (described as context in which a target is embedded):