Examine source code of Cortex Podcast Theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#333333",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Cortex Podcast Theme",
  "manifest_version": 2,
  "description": "A light-weight theme derived from the artwork of the Cortex podcast by RelayFM and accompanying DuckDuckGo search engine dark theme."
}