Examine source code of geomix-dev

{
  "theme": {
    "images": {
      "theme_frame": "geomix-persona-head.jpg"
    },
    "colors": {
      "frame": "#d9d9d9",
      "tab_background_text": "#356b7f"
    }
  },
  "version": "2.0",
  "name": "geomix-dev",
  "manifest_version": 2
}