Examine source code of Midnight Sun

{
  "theme": {
    "images": {
      "theme_frame": "MidnightSun.jpg"
    },
    "colors": {
      "frame": "#f0d3d3",
      "tab_background_text": "#121011"
    }
  },
  "version": "2.0",
  "name": "Midnight Sun",
  "manifest_version": 2,
  "description": "Photograph taken in the Baltic"
}