Valkyrja Night for GitHub (unofficial) by HrafnaValkyrja

Not affiliated with or endorsed by GitHub. "GitHub" is a trademark of GitHub, Inc.; it is used here only to name the website this add-on restyles.

Valkyrja Night restyles GitHub in true black:
• True-black pages, with depth from faint indigo layers and a night-sky header.
• One cyan accent for buttons, links, focus and the active tab.
• Colour keeps its meaning: additions and open items mint, deletions, errors and closed items pink, merged/done violet.
• Readable syntax highlighting and diffs.
• Barlow and IBM Plex Mono fonts, bundled (SIL Open Font License).
• Works whether GitHub is set to light or dark.

How it works: stylesheets that set GitHub's own design tokens. No JavaScript, no network requests, access to github.com only. This add-on collects no data.

Open source (MPL-2.0): https://github.com/HrafnaValkyrja/valkyrja-night-github