Yeah. Sounds like true web brutalism would mean little to no styling. Just plain Times New Roman everywhere. Black text on grey or white, blue/purple links, etc. Apart from the font (which would probably be going a bit too far for many people), your blog is an excellent example.
How would that translate to the Web? IMO by blurring the distinction between the rendered page and the page source. Nothing to hide!
I went ahead and did just that on my own blog: https://dcz_self.gitlab.io/posts/brutalism/