Examine source code of invert red

{
  "name": "invert red",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "photo-1580566176138-daa588058b59.jpeg"
    },
    "colors": {
      "frame": "rgba(13, 75, 219, 1)",
      "tab_background_text": "rgba(230, 14, 14, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(204, 25, 18, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fa67f57-db2a-4709-8f2d-d9531da0f2ed}"
    }
  }
}