Examine source code of good blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "good blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(25, 32, 36)",
      "toolbar_text": "rgb(157, 210, 192)",
      "frame": "rgb(25, 32, 36)",
      "tab_background_text": "rgb(171, 188, 196)",
      "toolbar_field": "rgb(33, 43, 48)",
      "toolbar_field_text": "rgb(171, 188, 196)",
      "tab_line": "rgb(157, 210, 192)",
      "popup": "rgb(25, 32, 36)",
      "popup_text": "rgb(157, 210, 192)",
      "tab_loading": "rgb(157, 210, 192)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e4cdbfb1-2cb4-413c-86d8-8c48bf84f36e}"
    }
  }
}