Examine source code of Classic Mini

{
  "theme": {
    "images": {
      "theme_frame": "ClassicMiniHeader.jpg"
    },
    "colors": {
      "frame": "#c7c7c7",
      "tab_background_text": "#c7c7c7"
    }
  },
  "version": "2.0",
  "name": "Classic Mini",
  "manifest_version": 2,
  "description": "Classic Minis. I love them. I hope you do, too."
}