Examine source code of Pop Blue

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "BluenGrey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-001-9c6d74e14860e77ee6f8f43e824bff25.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(75, 75, 75, 0.5)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(72, 72, 72)",
      "tab_background_text": "rgb(193, 193, 193)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 207, 255)",
      "popup": "rgb(72, 72, 72)",
      "popup_text": "rgb(0, 207, 255)",
      "ntp_background": "rgb(72, 72, 72)",
      "popup_border": "rgb(0, 207, 255)",
      "tab_selected": "rgba(0, 30, 255, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgba(44, 0, 255, 0)",
      "toolbar_field_border": "rgba(44, 0, 255, 0)",
      "toolbar_field_focus": "rgb(72, 72, 72)",
      "toolbar_top_separator": "rgba(44, 0, 255, 0)",
      "tab_loading": "rgb(0, 207, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c107fb5-50a6-4647-b039-f880bc7123b2}"
    }
  }
}