Examine source code of Prism--

{
  "theme": {
    "images": {
      "theme_frame": "prsim.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#9e9e9e"
    }
  },
  "version": "2.0",
  "name": "Prism--",
  "manifest_version": 2,
  "description": "darkside of the mooon modified to be a persona prism"
}