Examine source code of Willow Pattern

{
  "theme": {
    "images": {
      "theme_frame": "willow-header.png"
    },
    "colors": {
      "frame": "#cadde3",
      "tab_background_text": "#091523"
    }
  },
  "version": "2.0",
  "name": "Willow Pattern",
  "manifest_version": 2,
  "description": "The Willow pattern, more commonly known as Blue Willow, is a distinctive and elaborate pattern used on ceramic kitchen/housewares."
}