Examine source code of grapes pattern

{
  "theme": {
    "images": {
      "theme_frame": "grapeheader.jpg"
    },
    "colors": {
      "frame": "#f7faf9",
      "tab_background_text": "#04120f"
    }
  },
  "version": "2.0",
  "name": "grapes pattern",
  "manifest_version": 2,
  "description": "japanese grape pattern"
}