Author here. For those who don't care for the color scheme, my site has - a light theme: https://eblog.fly.dev/githubbad-light.html - a plain theme: https://eblog.fly.dev/githubbad-plain.html, added as part of the same update where I submitted this article. Both of those are available as PDFs as well (replace .html with .pdf).

And of course you can use reader mode in your favorite browser.