Examine source code of Flat Night

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Flat Night",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-037-b73f9b34467ba541de861f5b4c0c6316.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 34, 61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(215, 226, 239)",
      "toolbar_field": "rgba(44, 48, 84, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(205, 35, 185)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_active": "rgba(255, 255, 255, 0.2)",
      "button_background_hover": "rgba(255, 255, 255, 0.1)",
      "icons": "rgba(255, 255, 255, 0.5)",
      "ntp_background": "rgb(31, 34, 61)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(54, 58, 89, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(36, 39, 69)",
      "sidebar_border": "rgb(31, 34, 61)",
      "sidebar": "rgb(31, 34, 61)",
      "tab_background_separator": "rgba(54, 58, 89, 0)",
      "toolbar_bottom_separator": "rgba(31, 34, 61, 0)",
      "toolbar_field_border_focus": "rgba(255, 255, 255, 0)",
      "toolbar_field_border": "rgba(255, 255, 255, 0)",
      "toolbar_field_focus": "rgba(31, 34, 61, 0)",
      "toolbar_field_highlight_text": "rgb(154, 181, 255)",
      "toolbar_field_highlight": "rgba(205, 35, 185, 0)",
      "toolbar_field_separator": "rgba(255, 255, 255, 0)",
      "toolbar_field_text_focus": "rgba(255, 255, 255, 0.9)",
      "toolbar_top_separator": "rgba(205, 35, 185, 0)",
      "toolbar_vertical_separator": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgb(205, 35, 185)"
    }
  }
}