Examine source code of Rainbow Abstraction

{
  "theme": {
    "images": {
      "theme_frame": "AbstractionHeader.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#f7a3f4"
    }
  },
  "version": "2.0",
  "name": "Rainbow Abstraction",
  "manifest_version": 2,
  "description": "Just a nice colorful accent on a starry background. This was done using Adobe Photoshop CS3."
}