Examine source code of dark mode sunset

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark mode sunset",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(29, 21, 40)",
      "toolbar_text": "rgb(255, 112, 84)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(118, 102, 248)",
      "toolbar_field": "rgb(49, 45, 70)",
      "toolbar_field_text": "rgb(226, 162, 45)",
      "tab_line": "rgb(112, 35, 121)",
      "popup": "rgb(20, 22, 32)",
      "popup_text": "rgb(255, 153, 129)",
      "button_background_active": "rgb(19, 30, 121)",
      "button_background_hover": "rgb(0, 0, 0)",
      "icons": "rgb(187, 38, 73)",
      "ntp_background": "rgb(23, 20, 32)",
      "popup_border": "rgb(19, 30, 121)",
      "popup_highlight_text": "rgba(247, 112, 3, 0.82)",
      "popup_highlight": "rgb(36, 22, 74)",
      "sidebar_text": "rgb(247, 172, 167)",
      "tab_background_separator": "rgba(247, 112, 3, 0.82)",
      "tab_selected": "rgb(51, 27, 17)",
      "tab_text": "rgb(248, 132, 67)",
      "toolbar_bottom_separator": "rgb(106, 17, 131)",
      "toolbar_field_border": "rgb(42, 52, 147)",
      "toolbar_field_separator": "rgb(140, 28, 74)",
      "toolbar_top_separator": "rgb(29, 18, 116)",
      "toolbar_vertical_separator": "rgb(140, 28, 74)",
      "tab_loading": "rgb(112, 35, 121)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{812ab7f6-463e-469e-be73-6656099a7add}"
    }
  }
}