Examine source code of High contrast neon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Simple neon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(14, 14, 14)",
      "toolbar_text": "rgb(227, 236, 52)",
      "frame": "rgb(14, 14, 14)",
      "tab_background_text": "rgb(21, 240, 216)",
      "toolbar_field": "rgb(58, 58, 62)",
      "toolbar_field_text": "rgb(227, 236, 52)",
      "tab_line": "rgb(21, 240, 216)",
      "popup": "rgb(14, 14, 14)",
      "popup_text": "rgb(227, 236, 52)",
      "button_background_active": "rgb(163, 84, 165)",
      "button_background_hover": "rgb(163, 84, 165)",
      "icons": "rgb(21, 240, 216)",
      "ntp_background": "rgb(58, 58, 62)",
      "ntp_text": "rgb(227, 236, 52)",
      "popup_highlight_text": "rgb(21, 240, 216)",
      "popup_highlight": "rgb(163, 84, 165)",
      "sidebar_border": "rgb(227, 236, 52)",
      "sidebar_highlight_text": "rgb(227, 236, 52)",
      "sidebar_highlight": "rgb(163, 84, 165)",
      "sidebar_text": "rgb(196, 200, 99)",
      "sidebar": "rgb(58, 58, 62)",
      "tab_selected": "rgba(163, 84, 165, 0.87)",
      "tab_text": "rgb(227, 236, 52)",
      "toolbar_field_border_focus": "rgb(21, 240, 216)",
      "toolbar_field_highlight": "rgba(163, 84, 165, 0.87)",
      "toolbar_field_separator": "rgb(227, 236, 52)",
      "toolbar_field_text_focus": "rgb(227, 236, 52)",
      "tab_loading": "rgb(21, 240, 216)"
    }
  }
}