Examine source code of Test Theme Jonas Gisler

{
  "name": "Test Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "button.png"
    },
    "colors": {
      "frame": "rgba(121, 141, 189, 1)",
      "tab_background_text": "rgba(199, 30, 30, 1)",
      "bookmark_text": "rgba(212, 53, 53, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee5c302e-b965-4cb5-9247-41611322e6af}"
    }
  }
}