Now that an expanded set of option tokens has been added to the WikimediaUI theme file in the Codex design tokens package, we need to take the next step and select a sub-set of these tokens to serve as decision tokens in our upcoming dark mode.
==== Acceptance Criteria
- [ ] Create a new file, `modes/dark.json` in the `codex-design-tokens` project
- [ ] This file should contain a subset of the tokens in `application.json` (anything that dark mode needs to override); token names should be the same but the values should draw from other pre-defined option tokens (from the newly added colors). Colors should be represented as hex values.
- [ ] Confirm with design that all chosen colors are correct.
Note: This task does not include the work to output dark-mode specific assets. See T360343 for that work.