### Preflight Checklist - [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project. - [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/CODE_OF_CONDUCT.md) that this project adheres to. - [x] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success. ### Problem Description The new `accentColor` option for Windows can only be set on construction time. ### Proposed Solution Allow to update it after the window has been created. ### Alternatives Considered None. ### Additional Information _No response_