Examine source code of Matcha Dark Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Matcha",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(39, 49, 54)",
      "toolbar_text": "rgb(164, 176, 126)",
      "frame": "rgb(28, 36, 39)",
      "tab_background_text": "rgb(164, 176, 126)",
      "toolbar_field": "rgb(28, 36, 39)",
      "toolbar_field_text": "rgb(164, 176, 126)",
      "tab_line": "rgb(126, 176, 163)",
      "popup": "rgb(39, 49, 54)",
      "popup_text": "rgb(164, 176, 126)",
      "button_background_active": "rgb(28, 36, 39)",
      "icons_attention": "rgb(192, 174, 105)",
      "popup_highlight_text": "rgb(39, 49, 54)",
      "popup_highlight": "rgb(126, 164, 176)",
      "tab_loading": "rgb(192, 174, 105)",
      "tab_selected": "rgb(39, 49, 54)",
      "tab_text": "rgb(164, 176, 126)",
      "toolbar_bottom_separator": "rgb(39, 49, 54)",
      "toolbar_field_border_focus": "rgb(126, 176, 163)",
      "toolbar_field_highlight_text": "rgb(39, 49, 54)",
      "toolbar_field_highlight": "rgb(126, 164, 176)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5fcab34c-d331-49c8-8c8c-8b10a5d6c417}"
    }
  }
}