- Introduced `ColorPaletteMixin` to centralize color choice fields and hex code properties across `HadisStatus`, `TransmitterReliability`, and `OpinionStatus` models.
- Updated the `color` field in these models to use the mixin, enhancing code reusability and maintainability.
- Modified serializers to include `main_color_code` and `light_color_code` properties for better color representation in API responses.
- Added a new migration to adjust the database schema for the updated models.