Examine source code of daisy cubes

{
  "theme": {
    "images": {
      "theme_frame": "daisy_cube.jpg"
    },
    "colors": {
      "frame": "#f5eded",
      "tab_background_text": "#f2efef"
    }
  },
  "version": "2.0",
  "name": "daisy cubes",
  "manifest_version": 2,
  "description": "cubes with daisies on them"
}