Examine source code of Holiday twinkle

{
  "theme": {
    "images": {
      "theme_frame": "xmas-celebrate-green.jpg"
    },
    "colors": {
      "frame": "#98ba6e",
      "tab_background_text": "#435928"
    }
  },
  "version": "2.0",
  "name": "Holiday twinkle",
  "manifest_version": 2,
  "description": "Non-specific holiday header with a twinkly, starry ambience."
}