Examine source code of Interstellar

{
  "name": "Awesome Space",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header (4).jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0)",
      "tab_background_text": "rgba(114, 169, 184, 0.8)",
      "toolbar": "rgba(0, 255, 102, 0.3)",
      "bookmark_text": "rgba(186, 241, 255, 0.8)",
      "toolbar_field": "rgba(216, 245, 196, 0.8)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}