Examine source code of Painted Shamrocks

{
  "theme": {
    "images": {
      "theme_frame": "PaintedShamrocksH.jpg"
    },
    "colors": {
      "frame": "#021c09",
      "tab_background_text": "#021c09"
    }
  },
  "version": "2.0",
  "name": "Painted Shamrocks",
  "manifest_version": 2,
  "description": "Whimsical painted shamrocks for St. Patrick's Day."
}