Examine source code of Dark Red Theme

{
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "darkredtheme@yeet.com",
      "strict_min_version": "100.0"
    }
  },
  "version": "1.0",
  "name": "Dark Red Theme",
  "theme": {
    "colors": {
      "frame": "#1C1B22",
      "tab_background_text": "#FFFFFF",
      "toolbar": "#2B2A33",
      "bookmark_text": "#FFFFFF",
      "tab_selected": "#66393F",
      "tab_text": "#FFFFFF",
      "tab_line": "#1C1B22",
      "toolbar_field": "#1C1B22",
      "toolbar_field_border_focus": "#66393F",
      "toolbar_field_text": "#FFFFFF",
      "toolbar_field_highlight": "#66393F",
      "toolbar_top_separator": "#1C1B22",
      "ntp_background": "#1C1B22",
      "ntp_text": "#FFFFFF",
      "popup": "#1C1B22",
      "popup_text": "#FFFFFF",
      "popup_highlight": "#66393F",
      "popup_highlight_text": "#FFFFFF",
      "sidebar": "#1C1B22",
      "sidebar_text": "#FFFFFF",
      "sidebar_highlight": "#66393F",
      "sidebar_highlight_text": "#FFFFFF"
    }
  }
}