Examine source code of Checkerboard2

{
  "theme": {
    "images": {
      "theme_frame": "PPPFFF.jpg"
    },
    "colors": {
      "frame": "#fb00ff",
      "tab_background_text": "#fb00ff"
    }
  },
  "version": "2.0",
  "name": "Checkerboard2",
  "manifest_version": 2,
  "description": "Another test for a checkerboard design"
}