Examine source code of decay rainbow

{
  "theme": {
    "images": {
      "theme_frame": "persona_decay_header2.jpg"
    },
    "colors": {
      "frame": "#004054",
      "tab_background_text": "#e6e6e6"
    }
  },
  "version": "2.0",
  "name": "decay rainbow",
  "manifest_version": 2,
  "description": "rusting paint forms a rainbow abstraction"
}