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Birkir Gudjonsson
6287c447d6
Summary:
Allow you to harvest the `UIAccessibilityContrastHigh` trait from iOS to show accessible colors when high contrast mode is enabled.
```jsx
// usage
PlatformColorIOS({
light: '#eeeeee',
dark: '#333333',
highContrastLight: '#ffffff',
highContrastDark: '#000000',
});
// {
// "dynamic": {
// "light": "#eeeeee",
// "dark": "#333333",
// "highContrastLight": "#ffffff",
// "highContrastDark": "#000000",
// }
// }
```
This is how apple's own dynamic system colors work under the hood (https://developer.apple.com/design/human-interface-guidelines/ios/visual-design/color/#dynamic-system-colors)
---
The react native docs mention that more keys may become available in the future, which this PR is adding:
> In the future, more keys might become available for different user preferences, like high contrast.
https://reactnative.dev/docs/dynamiccolorios
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[iOS] [Added] - High contrast dynamic color options for dark and light mode.
Pull Request resolved: https://github.com/facebook/react-native/pull/31651
Test Plan: Added unit tests for `normalizeColor` to pass the high contrast colors downstream to RCTConvert
Reviewed By: lunaleaps
Differential Revision: D28922536
Pulled By: p-sun
fbshipit-source-id: f81417f003c3adefac50e994e62b9be14ffa91a1