Examine source code of Etching

{
  "theme": {
    "images": {
      "theme_frame": "persona1.jpeg"
    },
    "colors": {
      "frame": "#fcefca",
      "tab_background_text": "#261c1c"
    }
  },
  "version": "2.0",
  "name": "Etching",
  "manifest_version": 2,
  "description": "Detail of a print by Rebecca Bourke"
}