Examine source code of Zeptonn Rainbowland

{
  "theme": {
    "images": {
      "theme_frame": "Zeptonn_persona_top.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#070c0d"
    }
  },
  "version": "2.0",
  "name": "Zeptonn Rainbowland",
  "manifest_version": 2,
  "description": "A Zeptonn landscape filled with rainbows and fantastic creatures. This is a large version for somewhat smaller screens."
}