Examine source code of Simple Green Dots

{
  "theme": {
    "images": {
      "theme_frame": "simplegreendots2222.jpg"
    },
    "colors": {
      "frame": "#233d0a",
      "tab_background_text": "#27400a"
    }
  },
  "version": "2.0",
  "name": "Simple Green Dots",
  "manifest_version": 2,
  "description": "A simple green gradient with dots."
}