Examine source code of NightVision

{
  "name": "NightVision",
  "manifest_version": 2,
  "version": "89.14",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_tiling": [
        "repeat"
      ],
      "additional_backgrounds_alignment": [
        "right top"
      ]
    },
    "colors": {
      "bookmark_text": "#fff",
      "frame": "#111",
      "ntp_background": "#000",
      "ntp_text": "#fff",
      "popup": "rgba(13, 13, 13, 1)",
      "popup_border": "#111",
      "popup_highlight": "#222",
      "popup_highlight_text": "#D5D5D5",
      "popup_text": "#00FF38",
      "sidebar": "rgba(13, 13, 13, 1)",
      "sidebar_border": "#000",
      "sidebar_highlight": "#222",
      "sidebar_highlight_text": "#D5D5D5",
      "sidebar_text": "#00FF38",
      "tab_background_text": "#00FF38",
      "tab_line": "#00FF38",
      "tab_selected": "#00FF0022",
      "tab_text": "#00FF38",
      "toolbar": "#0000",
      "toolbar_field": "rgba(13, 13, 13, 1)",
      "toolbar_field_focus": "rgba(13, 13, 13, 1)",
      "toolbar_field_highlight": "#222",
      "toolbar_field_highlight_text": "#fff",
      "toolbar_field_text": "#00FF38",
      "toolbar_field_text_focus": "#00FF38",
      "toolbar_text": "#00FF38",
      "toolbar_field_border": "rgba(0, 0, 0, 0)",
      "toolbar_field_border_focus": "rgba(0, 0, 0, 0)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)"
    }
  }
}