The author goes out of the way to mention multiple times, the first at the top of the post, that Medium offers very little control in this regard. Maybe true,

The author goes out of the way to mention multiple times, the first at the top of the post, that Medium offers very little control in this regard. Maybe true, but this is the first Medium page I've seen with this bizarre color scheme and I hit perhaps 50-60 Medium articles a week in my work. So it's certainly something to do with the theming of his site.