Examine source code of Seasonal

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#a8dfed",
      "tab_background_text": "#de0707"
    }
  },
  "version": "2.0",
  "name": "Seasonal",
  "manifest_version": 2,
  "description": "Its made up of a natural photograph of a garden, in the morning. Its seasonal as well as natural."
}