# Provenance

**Developed and first published:** 2026-10-27 by Christian Sass, Binary Ranch.

This repository is the public record of the work: the three-tier dark theme design, the
measured contrast analysis, and the working userscript were built on this date, before the
proposal was sent to Otter.ai. The git history and the file digests below are the evidence.

## What this claims

- The three-tier structure (Midnight / Dusk / Slate) as applied to a meeting-transcript
  product, with contrast held roughly constant across surface lightness.
- The split between `--ot-accent` (text-safe accent) and `--ot-accent-fill` (solid button
  fill) as the resolution of a brand colour that fails contrast on dark surfaces.
- The userscript technique of a shade-parameterised invert with an exact analytic inverse
  applied to media elements, so photographs keep their true colour.

## What this does not claim

No affiliation with, endorsement by, or access to the internal codebase of Otter.ai
(AISense Inc.). This is an independent design proposal offered publicly, under the MIT
licence, in the hope that it is useful.

## File digests (SHA-256)

| File | SHA-256 |
|---|---|
| `README.md` | `859bc3ba8215ce1045da55266bb5c7bb75a04d61f8a1183db97bd8c0f5b0e11f` |
| `LICENSE` | `fa7a1b8b7526dbd4e866fef2f6b046ef7f24df004e4a3bb860730537b9e0ba1c` |
| `otter-dark.css` | `e584729f7770bb2729cbfdce570e60f0fb75abd7a91eab60f4d7b72607878266` |
| `preview.html` | `94b8fd8ce7f1189fd6d79f63ab04f25b64f34382b9e8f856536459b4a8358a78` |
| `preview.png` | `f93e9a370b0049be794480066e756404241cbd64cd3a5a368bb52718de1aeb4b` |
| `userscript/otter-dark-mode.user.js` | `af90dc3d5b174f174353a28de8054a92550cc9f1f043cafb6521d4be8962693d` |

Reproduce with:

```bash
sha256sum README.md LICENSE otter-dark.css preview.html preview.png userscript/otter-dark-mode.user.js
```