Examine source code of Green grass on white

{
  "theme": {
    "images": {
      "theme_frame": "GreengrassHdr.jpg"
    },
    "colors": {
      "frame": "#0a0505",
      "tab_background_text": "#5f058c"
    }
  },
  "version": "2.0",
  "name": "Green grass on white",
  "manifest_version": 2,
  "description": "green grass - white background\nspring is in the air"
}