Examine source code of orange

{
  "name": "orange",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled-1.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(209, 123, 25, 1)",
      "toolbar": "rgba(44, 39, 54, 1)",
      "bookmark_text": "rgba(209, 123, 25, 1)",
      "toolbar_field": "rgba(156, 156, 156, 1)",
      "toolbar_field_text": "rgba(209, 123, 25, 1)"
    }
  }
}