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Enhances the accessibility of Bootstrap 5 when using with [Contrast themes in Windows](https://blogs.windows.com/msedgedev/2020/09/17/styling-for-windows-high-contrast-with-new-standards-for-forced-colors/).
This CSS file fixes many issues and adds enhancements to make Bootstrap 5 more accessible in Firefox, Chrome, Edge on Windows using the [`forced-colors: active` media query](https://developer.mozilla.org/en-US/docs/Web/CSS/@media/forced-colors).
## Quick start
- Download the [latest release](https://github.com/coliff/bootstrap-forced-colors-css/releases/latest)
- Clone the repository `git clone https://github.com/coliff/bootstrap-forced-colors-css.git`
- Install with [npm](https://www.npmjs.com/package/bootstrap-forced-colors-css) `npm install bootstrap-forced-colors-css`
- Install with [Yarn](https://classic.yarnpkg.com/en/package/bootstrap-forced-colors-css) `yarn add bootstrap-forced-colors-css`
- Install with [Composer](https://packagist.org/packages/coliff/bootstrap-forced-colors-css) `composer require coliff/bootstrap-forced-colors-css`
## Usage
Add this in the `` which will load the CSS using a media query as follow:
```html
```
The CSS can be loaded via a CDN:
```html
```
Or you can import the CSS into your own CSS file:
```scss
@import bootstrap-forced-colors.min.css
```
> [!NOTE]
> bootstrap-forced-colors-css improves the accessibility of Bootstrap 5 for Windows users in forced colors mode, but you should still test your site to ensure it meets your accessibility requirements.
## FAQS
### What does this fix/improve?
- [Accordion](https://coliff.github.io/bootstrap-forced-colors-css/tests/#accordion) buttons have improved contrast in dark mode
- [Badges](https://coliff.github.io/bootstrap-forced-colors-css/tests/#badge) within buttons have a 1px border to improve contrast
- [Buttons](https://coliff.github.io/bootstrap-forced-colors-css/tests/#buttons) have improved focus state contrast (2px visible outline rather than 1px)
- [Disabled buttons](https://coliff.github.io/bootstrap-forced-colors-css/tests/#buttons) display the correct color using the `GrayText` name
- [Carousel](https://coliff.github.io/bootstrap-forced-colors-css/tests/#carousel) indicators have background-color issue resolved
- [Close button](https://coliff.github.io/bootstrap-forced-colors-css/tests/#toasts) has improved contrast by reducing the opacity
- [Dropdown](https://coliff.github.io/bootstrap-forced-colors-css/tests/#dropdowns) toggle arrows appear correctly (as triangles and not rectangles)
- [List Group](https://coliff.github.io/bootstrap-forced-colors-css/tests/#list-group) disabled items display the correct color using the `GrayText` name
- [Modal](https://coliff.github.io/bootstrap-forced-colors-css/tests/#modal) backdrop opacity changed from 0.5 to 0.8
- [Navbar](https://coliff.github.io/bootstrap-forced-colors-css/tests/#navbar) Menu (hamburger) toggle icons display correctly
- [Navs](https://coliff.github.io/bootstrap-forced-colors-css/tests/#navs) Improves active and focus state contrast
- [Pagination](https://coliff.github.io/bootstrap-forced-colors-css/tests/#pagination): Active page link has outline to indicate active page
- [Pagination](https://coliff.github.io/bootstrap-forced-colors-css/tests/#pagination): Disabled page link display the correct color using the `GrayText` name
- [Placeholder](https://coliff.github.io/bootstrap-forced-colors-css/tests/#placeholder): Fix for invisible placeholder boxes
- [Popovers](https://coliff.github.io/bootstrap-forced-colors-css/tests/#popovers): Fixes invisible arrow issue
- [Progress](https://coliff.github.io/bootstrap-forced-colors-css/tests/#progress): Is no longer invisible
- [Progress](https://coliff.github.io/bootstrap-forced-colors-css/tests/#progress): Improved stacked progress bar contrast
- [Spinners](https://coliff.github.io/bootstrap-forced-colors-css/tests/#spinners): Fixes animation
- [Tables](https://coliff.github.io/bootstrap-forced-colors-css/tests/#tables): Have a 1px outline to improve contrast
- [Toasts](https://coliff.github.io/bootstrap-forced-colors-css/tests/#toasts): Fixes invisible close/dismiss button
- [Tooltips](https://coliff.github.io/bootstrap-forced-colors-css/tests/#tooltips): Fix for arrows appearing as rectangles
- [Tooltips](https://coliff.github.io/bootstrap-forced-colors-css/tests/#tooltips): Add 1px border to tooltips content
- [Vertical Rule](https://coliff.github.io/bootstrap-forced-colors-css/tests/#navbar): Fixes invisible vertical rule
- [Horizontal Rule](https://coliff.github.io/bootstrap-forced-colors-css/tests/#navbar): Improves contrast by changing opacity from 0.25 to 0.5
### Known Issues
- Check the [open issues at GitHub](https://github.com/coliff/bootstrap-forced-colors-css/issues).
## Demo
See this in action at: [https://coliff.github.io/bootstrap-forced-colors-css/tests/](https://coliff.github.io/bootstrap-forced-colors-css/tests/)
## Testing
Currently, only Windows 10 & 11 with Edge, Firefox, and Chrome support forced colors mode. To test, you can enable forced colors mode in:
- Windows 10: Go to `Settings > Ease of Access > High contrast` and select a theme.
- Windows 11: Go to `Settings > Accessibility > Contrast themes` and select a theme.
You can also use the [Forced Colors Mode Emulation](https://developer.chrome.com/docs/devtools/rendering/emulate-css#emulate_css_media_feature_forced-colors) in Edge and Chrome on all platforms.
> [!NOTE]
> By default, the Forced Colors Mode emulation is a dark mode theme, but you can switch to a light theme by forcing the `prefers-color-scheme` to light in the Dev Tools. Remember that the user can't use Bootstrap's light/dark mode theme toggle. The color scheme is set by the user at the OS level.
Note that [CanIUse lists Safari as supporting forced colors mode](https://caniuse.com/mdn-css_at-rules_media_forced-colors), however macOS itself doesn't have a Forced Colors / High Contrast mode which means it's not possible to use this with Safari at all.
