Examine source code of Sleeping Koala

{
  "name": "Sleeping Koala",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Koala.jpg"
    },
    "colors": {
      "frame": "#ccbc97",
      "tab_background_text": "rgba(255, 241, 201, 1)",
      "toolbar": "rgba(255, 247, 224, 0.1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 251, 240, 1)"
    }
  }
}