Examine source code of Familiar Blue

{
  "manifest_version": 2,
  "version": "3.4",
  "name": "Familiar Blue",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(245, 248, 253)",
      "toolbar_text": "rgb(31, 53, 83)",
      "frame": "rgb(71, 146, 230)",
      "tab_background_text": "rgb(248, 248, 248)",
      "toolbar_field": "rgb(234, 237, 241)",
      "toolbar_field_text": "rgb(32, 33, 36)",
      "tab_line": "rgb(71, 146, 230)",
      "popup": "rgb(245, 248, 253)",
      "popup_text": "rgb(31, 53, 83)",
      "button_background_hover": "rgb(142, 184, 232)",
      "sidebar_border": "rgb(171, 173, 177)",
      "sidebar_highlight_text": "rgb(246, 248, 250)",
      "sidebar_highlight": "rgb(71, 146, 230)",
      "sidebar_text": "rgb(31, 53, 83)",
      "sidebar": "rgb(245, 248, 253)",
      "toolbar_bottom_separator": "rgb(171, 173, 177)",
      "toolbar_field_border_focus": "rgb(71, 146, 230)",
      "toolbar_field_border": "rgb(246, 248, 250)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(156, 195, 245)",
      "tab_loading": "rgb(71, 146, 230)"
    }
  }
}