Fix issue on brand color override

[bmarty]

Content

Fix issue on brand color override and enable Konsist test.

Motivation and context

The issue was not visible since # was not necessary, but let's be consistent in the color format.

Screenshots / GIFs

No impact.

Tests

• No change.

Tested devices

NA

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.70%. Comparing base (7baae58) to head (e38c385).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #5626   +/-   ##
========================================
  Coverage    81.70%   81.70%           
========================================
  Files         2391     2391           
  Lines        64948    64948           
  Branches      8253     8253           
========================================
  Hits         53063    53063           
  Misses        8825     8825           
  Partials      3060     3060           

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