I got curious and looked back in archive.org to this page's initial release in 2014. The text background started out as good old reliable background-color: #EEEEEE, which was later replaced with background: url("http://a.yu8.us/bg-tile-parch.gif")
...because what could possibly go wrong? From the latest comment at the end of the page, the author would like you to know that the outcome is your problem, because you're using the wrong browser:
June 20, 2021 - 15:02
Subject: RE: Undoing whatever is hiding this page.
Hi Allen, try a different browser. There's no strange shading on the page, your browser is deciding to display it in a weird way. Regards, -Rex
...because what could possibly go wrong? From the latest comment at the end of the page, the author would like you to know that the outcome is your problem, because you're using the wrong browser:
June 20, 2021 - 15:02
Subject: RE: Undoing whatever is hiding this page.
Hi Allen, try a different browser. There's no strange shading on the page, your browser is deciding to display it in a weird way. Regards, -Rex