Examine source code of Sparkle Light Theme

{
  "name": "Sparkle Light Theme",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "Sparkle Light.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(3, 3, 3, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e3cf4b0a-5822-42c9-88a9-ab343675b6fb}"
    }
  }
}