Show HN: Hacker News dark mode with uBlockOrigin / AdGuard cosmetic filters

Cosmetic filters are usually used to hide elements, but they can also be used to add CSS styles to the matching elements. Inspired by https://news.ycombinator.com/item?id=32719488, here are two rules to implement a dark mode on HN:

    news.ycombinator.com##html:style(filter:invert(100%) hue-rotate(180deg))
    news.ycombinator.com##body:style(background: white)

The first rule inverts all colors (white to black, orange to blue), then returns blues to oranges with a hue rotation. The second rule adds a black border in the margins around the main table (white + invert(100%) = black).

To use these rules:

- uBlockOrigin: open the preferences (right-click on the toolbar icon and cog icon, or via the extension list), and copy these in the "My filters" tab

- AdGuard: open the settings and copy these in the "User rules" section