Examine source code of pink_circles

{
  "theme": {
    "images": {
      "theme_frame": "NewPicture3.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#e3dfdf"
    }
  },
  "version": "2.0",
  "name": "pink_circles",
  "manifest_version": 2,
  "description": "pink circles on black background with white text"
}