Examine source code of Spin Circular

{
  "theme": {
    "images": {
      "theme_frame": "spinCircularUpper.jpg"
    },
    "colors": {
      "frame": "#7a7a7a",
      "tab_background_text": "#f2f2f2"
    }
  },
  "version": "2.0",
  "name": "Spin Circular",
  "manifest_version": 2,
  "description": "Rich Color, soft accents within a space"
}