BILL SHEN

#### Description of Change Fix: #43367 The root cause why the theme does not work in DevTools is because there is an error when loading the colors.css file. [The specific...

#### Description of Change Fix #43367 #### Checklist - [x] PR description included and stakeholders cc'd - [x] `npm test` passes - [x] tests are [changed or added](https://github.com/electron/electron/blob/main/docs/development/testing.md) - [x]...