Author here: the normal text is basically black on white. Do you mean the inline code parts? There contrast might be a bit to low, yes. I'm not happy in general with it's formatting and will change it in the future. (It's the default of the template I used)
Thanks for the input!
As others said, the problem appears to be with the font. A child comment of one of your sibling comments linked to a side-by-side comparison of how your site looks (left) vs. reader mode (which I forgot about when trying to read the article): https://photos.app.goo.gl/ntvIcKSDTOfdkwAi1
