Examine source code of Rustic Rainbow

{
  "theme": {
    "images": {
      "theme_frame": "header2.JPG"
    },
    "colors": {
      "frame": "#575757",
      "tab_background_text": "#575757"
    }
  },
  "version": "2.0",
  "name": "Rustic Rainbow",
  "manifest_version": 2,
  "description": "Frayed pot of gold."
}