Yeah, I can see the value for autographed copies.

My designer is still in an ebook-paperback mode. (Hardcovers haven't been a thing for long enough, I guess, at least among his clients.) So the extra charge probably wouldn't be negligible. But if I discover it isn't all that much, I may start exploring.

If it's going to bother you, it probably is worth unpublishing and republishing. It's odd that paper color would be a thing that can't be changed because of the ISBN.

Having any luck selling hardcovers?

Yeah, the US ISBN thing is pretty crazy and scammy. I bought 100 too thinking it'd be enough for many years.

I goofed. I published my hardcover on Amazon for a 5th book in series with the wrong color paper--white.  Wouldn't be as much of a problem if it was a standalone, but now it won't match my other hardcovers in series. I've since learned that there's no way to change it after publication as it's linked with its Bowker ISBN. The thing that's really annoying about it is I'm sure I didn't click on white initially. Amazon reverts to a default. This created a similar problem a month ago, though caught in time by me, over Amazon's paperback size default for another book.

My only solution is to unpublish it and create a totally new hardcover version with a new ISBN.

But... does the color of the paper really matter? Will it matter if the new white doesn't match my past cream paper in other books?

I'm waiting for a hardcover to come in the mail to see how different it looks. Unfortunately, that's being delayed by Amazon shipping too :(

Yeah, Facebook insisted I confirm my identity and location because of the number of followers my author page has. It also insisted I install FB on my phone as a way of verifying my location. I didn't want it on my phone, but there you are.

My Wordpress site did get hacked once, but since installing Wordfence and other precautions, I haven't had a problem. People keep trying, but so far, so good.