Examine source code of Tomorrow Night

{
  "manifest_version": 2,
  "version": "1.0.1",
  "name": "Tomorrow Night",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(29, 31, 33)",
      "toolbar_text": "rgb(197, 200, 198)",
      "frame": "rgb(29, 31, 33)",
      "tab_background_text": "rgb(197, 200, 198)",
      "toolbar_field": "rgb(40, 42, 46)",
      "toolbar_field_text": "rgb(197, 200, 198)",
      "tab_line": "rgb(55, 59, 65)",
      "popup": "rgb(40, 42, 46)",
      "popup_text": "rgb(197, 200, 198)",
      "button_background_active": "rgb(40, 42, 46)",
      "button_background_hover": "rgb(55, 59, 65)",
      "ntp_background": "rgb(29, 31, 33)",
      "popup_border": "rgb(55, 59, 65)",
      "popup_highlight": "rgb(66, 113, 174)",
      "sidebar": "rgb(29, 31, 33)",
      "tab_loading": "rgb(240, 240, 240)",
      "tab_selected": "rgb(55, 59, 65)",
      "tab_text": "rgb(240, 240, 240)",
      "toolbar_field_border_focus": "rgb(66, 113, 174)",
      "toolbar_field_focus": "rgb(40, 42, 46)",
      "toolbar_field_highlight_text": "rgb(240, 240, 240)",
      "toolbar_field_highlight": "rgb(66, 113, 174)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3177265d-43d4-44ff-b923-55357c469a12}"
    }
  }
}