Agreed, if the goal is to make web content more comfortable to read, providing light on dark/dark on light choices, as well as a couple of other common palettes (like dark on sepia) for migraine sufferers would really have an outsized impact on consuming content on the web.
I considered adding a function that would let the browser's theme choose between a dark and a bright theme when in "Reader view." In Safari, this function is already available.
Although this seems to be implemented in recent releases, the dark theme is poorly designed. It uses the same colors for hyperlinks as the light theme, leading to almost unreadable links. Can we get a CSS fix so that the contrast is maintained and the links are readable, please?