Examine source code of Blue Ocean

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ocean",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(40, 82, 149)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(25, 52, 95)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(25, 52, 95)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(40, 82, 149)",
      "popup": "rgb(25, 52, 95)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(40, 82, 149)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3bfa7747-e8da-41e7-b320-4f495474c59b}"
    }
  }
}