Examine source code of Latvian Sky

{
  "theme": {
    "images": {
      "theme_frame": "latviansky.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Latvian Sky",
  "manifest_version": 2,
  "description": "Top of a Latvian Sky photograph by me. I created it as an alternative to Jurmala Sky as this one is a bit more typical blue with some white fluffy clouds."
}