Examine source code of Spring Garden Collage

{
  "theme": {
    "images": {
      "theme_frame": "GardenHeaderPersona.jpg"
    },
    "colors": {
      "frame": "#05660a",
      "tab_background_text": "#2f069e"
    }
  },
  "version": "2.0",
  "name": "Spring Garden Collage",
  "manifest_version": 2,
  "description": "A collage created from some of the spring flowers in my garden."
}