Examine source code of Stars Holiday

{
  "theme": {
    "images": {
      "theme_frame": "Stars_Holiday_Header.png"
    },
    "colors": {
      "frame": "#cc66cc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Stars Holiday",
  "manifest_version": 2,
  "description": "A starry theme that says Happy Holidays in the top right corner."
}