Examine source code of Grey_Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grey-Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(64, 62, 62)",
      "toolbar_text": "rgb(200, 197, 195)",
      "frame": "rgb(37, 36, 35)",
      "tab_background_text": "rgb(140, 140, 140)",
      "toolbar_field": "rgba(21, 21, 21, 0.7)",
      "toolbar_field_text": "rgb(35, 170, 252)",
      "tab_line": "rgb(35, 170, 252)",
      "popup": "rgba(21, 21, 21, 0.7)",
      "popup_text": "rgb(35, 170, 252)",
      "ntp_background": "rgb(43, 41, 40)",
      "popup_border": "rgb(35, 170, 252)",
      "tab_loading": "rgb(35, 170, 252)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0386b411-1bd8-4e83-9f7b-cfb40ebb0932}"
    }
  }
}