Examine source code of SimpleDesign Pipe-n-Box

{
  "theme": {
    "images": {
      "theme_frame": "simple-designs-pipeblocks-top.jpg"
    },
    "colors": {
      "frame": "#c955cf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "SimpleDesign Pipe-n-Box",
  "manifest_version": 2,
  "description": "Simple design that is visible regardless of how wide the browser borders are."
}