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Issue number: N/A --------- <!-- Please do not submit updates to dependencies unless it fixes an issue. --> <!-- Please try to limit your pull request to one type (bugfix, feature, etc). Submit multiple pull requests if needed. --> ## What is the current behavior? <!-- Please describe the current behavior that you are modifying. --> `high-contrast` and `high-contrast-dark` palettes were not working when requested through a URL query or hash for a test page. This was due to the `match` not accepting hyphens so it would only save `high` which is not a valid palette. ## What is the new behavior? <!-- Please describe the behavior or changes that are being added by this PR. --> - Updated `match` to accept hyphens - Added an error if an invalid palette is provided - Added a palette fallback if an invalid palette is provided - Added a class check for high contrast and high contrast dark ## Does this introduce a breaking change? - [ ] Yes - [x] No <!-- If this introduces a breaking change: 1. Describe the impact and migration path for existing applications below. 2. Update the BREAKING.md file with the breaking change. 3. Add "BREAKING CHANGE: [...]" to the commit description when merging. See https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#footer for more information. --> ## Other information <!-- Any other information that is important to this PR such as screenshots of how the component looks before and after the change. --> How to test: 1. Verify that `?palette=high-contrast`, `?palette=high-contrast-dark`, `#palette=high-contrast`, and `#palette=high-contrast-dark` render correctly (I recommend using [button basic page](https://ionic-framework-git-scripts-ionic1.vercel.app/src/components/button/test/basic/)) --------- Co-authored-by: Brandy Smith <brandyscarney@users.noreply.github.com>