Examine source code of core sample

{
  "theme": {
    "images": {
      "theme_frame": "Wealden_H.jpg"
    },
    "colors": {
      "frame": "#0b0c42",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "core sample",
  "manifest_version": 2,
  "description": "A drill core sample of Lower Cretaceous rock at Hanover in Germany."
}