Examine source code of Splatoon Blues

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#4a3299",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Splatoon Blues",
  "manifest_version": 2,
  "description": "One of the four backgrounds from the new Splatoon stats site <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/4c891dbe247e4015b0d83a3655f01ddeade1650d523900a43e9fd6cf781c5062/https%3A//splatoon.nintendo.net/\">https://splatoon.nintendo.net/</a>"
}