How to customize CKEditor 5 color palette in Strapi 4 with @ckeditor/strapi-plugin-ckeditor 0.0.10

I’m trying to customize the default color palette in CKEditor 5 for my Strapi 4 application. I want to replace the default colors with our brand colors from our design system.

Environment:

• Strapi version: 4.25.5
• CKEditor plugin: @ckeditor/[email protected]
• Node.js version: 22.11.0

Current package.json dependencies:

{
  "dependencies": {
    "@ckeditor/strapi-plugin-ckeditor": "1.1.0",
    "@strapi/strapi": "4.25.5",
    // ... other relevant dependencies
  }
}

1. Added CKEditor configuration in config/plugins.js:

module.exports = () => ({
  ckeditor: {
    enabled: true,
    config: {
      // ... my configuration attempt
    }
  }
});

2. Cleared cache and rebuilt:
rm -rf build
yarn build
yarn develop
I have no .cache folder. 
However, the default color palette remains unchanged.

**Expected behavior:
  *Custom brand colors should appear in the color picker dropdown 
  *Each color should have a custom label (e.g., "Pin Grün Dark", "PIN Blau Dark")
**Current behavior:
  *Default CKEditor color palette is still showing
  *Custom colors are not appearing in the dropdown
**Question:
How can I properly configure the CKEditor plugin to use my custom color palette? What's the correct configuration structure for version 1.1.0 of the plugin?