fix: update dark-contrast config

[truph01]

Explanation of Change

This PR fixes four bugs introduced by PR #85197 (High Contrast theme):

1. Invisible mentions in dark high-contrast mode (Theme - Highlighted search query and mention are not visible when high contrast mode is enabled #86339): The dark-contrast theme set mentionText to colors.blue600 but did not override mentionBG, which inherits colors.blue600 from the base dark theme. This made mention text and background the same color (#0164BF), rendering mentions invisible. Fixed by adding mentionText: colors.blue700, mentionBG: colors.blue100 to dark-contrast.ts:
   Result:

2. Enter key doesn't toggle high contrast switch (Preference - Unable to turn on the high contrast mode toggle using enter key #86346): The disableEnterShortcut guard in BaseSelectionList only checked for button and checkbox roles. When the Switch (role=switch) had focus inside the SelectionList footer, pressing Enter triggered the list's keyboard shortcut instead. Fixed by adding CONST.ROLE.SWITCH to disableEnterShortcut in BaseSelectionList.tsx

3. GBR badge ignores high contrast theme (Theme - High contrast theme is not applied on GBR on LHN #86349): badgeStrongText used hardcoded colors.white instead of a theme-aware variable. Fixed by changing it to theme.buttonSuccessText, which resolves to near-white in normal themes and dark green in high-contrast themes.

Result:

Fixed Issues

$ #79228 (Original issue)
$ #86339
$ #86346
$ #86349
PROPOSAL:

Tests

1. Enable dark mode and turn on high contrast toggle in Settings > Preferences > Theme
2. Go to a chat and type an @mention (e.g., @concierge) — verify the mention text is visible.
3. Navigate to Settings > Preferences > Theme, use Tab to focus the High Contrast toggle, press Enter — verify the toggle activates
4. With dark + high contrast enabled, check GBR badge text (Submit/Approve/Pay) on LHN entries — verify text uses high-contrast dark color instead of white

• Verify that no errors appear in the JS console

Offline tests

QA Steps

// TODO: These must be filled out, or the issue title must include ""[No QA].""

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
• I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
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• I verified any variables that can be defined as constants (ie. in CONST.ts or at the top of the file that uses the constant) are defined as such
• I verified that if a function's arguments changed that all usages have also been updated correctly
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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

Screen.Recording.2026-03-31.at.01.24.34.mov

[codecov]

Codecov Report

✅ Changes either increased or maintained existing code coverage, great job!

Files with missing lines	Coverage Δ
src/components/Badge.tsx	100.00% <100.00%> (ø)
src/components/SelectionList/BaseSelectionList.tsx	65.45% <100.00%> (ø)
...ListWithSections/BaseSelectionListWithSections.tsx	93.90% <100.00%> (ø)
src/styles/index.ts	49.00% <ø> (ø)
src/styles/theme/themes/dark-contrast.ts	100.00% <ø> (ø)
... and 94 files with indirect coverage changes

[melvin-bot]

@dubielzyk-expensify @jayeshmangwani One of you needs to copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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[MelvinBot]

Hey truph01, here are a few suggestions and observations:

1. badgeStrongText → theme.buttonSuccessText coupling

Using theme.buttonSuccessText for badge text works today because both contexts need the same color values, but it creates a semantic coupling — if buttonSuccessText is ever adjusted for button-specific reasons, it would unexpectedly change badge text too. A more robust approach would be to introduce a dedicated theme key (e.g., badgeStrongTextColor) or use a more general theme variable. That said, this is a minor concern and may not be worth the added complexity for a follow-up fix — just something to be aware of.

2. Unit tests

The PR doesn't include any test files, but the author checklist mentions adding unit tests for bug fixes. The Enter key + switch fix in BaseSelectionList would be a good candidate for a test — verifying that pressing Enter when a role="switch" element is focused doesn't trigger the list's keyboard shortcut. This would help prevent the regression from being reintroduced.

3. Mention colors look good

The mentionText: blue700 + mentionBG: blue100 combo for dark-contrast effectively mirrors the light-contrast approach (which also uses blue700 text on blue100 background). The contrast ratio between #003C73 and #B0D9FF should be strong. The bright mention pills will stand out more on the dark background compared to standard dark theme, but that's consistent with the high-contrast accessibility goal.

4. Type rename is clean

Renaming ButtonOrCheckBoxRoles → InteractiveElementRoles is a good call — the new name is extensible and won't need to change if more interactive roles are added later.

Overall the changes are focused and address the issues well.

[dubielzyk-expensify]

Images look good. I'm gonna run a test build to test further 👍

[github-actions]

🚧 @dubielzyk-expensify has triggered a test Expensify/App build. You can view the workflow run here.

[github-actions]

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[dubielzyk-expensify]

We need to fix the green mention as it doesn't pass AA:

Let's make it green100 for background and green700 for text only in dark contrast mode.