Examine source code of winter dream

{
  "theme": {
    "images": {
      "theme_frame": "Winter_Dreamtop.jpg"
    },
    "colors": {
      "frame": "#7891eb",
      "tab_background_text": "#7891eb"
    }
  },
  "version": "2.0",
  "name": "winter dream",
  "manifest_version": 2,
  "description": "just a winter dream, by looking at a snowflake."
}