Examine source code of Royally Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Royal Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 40, 156)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(16, 23, 112)",
      "tab_background_text": "rgb(138, 174, 237)",
      "toolbar_field": "rgb(16, 23, 112)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(31, 40, 156)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(29, 36, 167)",
      "ntp_background": "rgb(239, 176, 194)",
      "tab_loading": "rgb(31, 40, 156)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d2299f7-4405-408b-a7fa-8f7142f45924}"
    }
  }
}