Default Inkscape Template Dark Theme US Letter

default.svg

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   sodipodi:docname="default.svg"
   inkscape:version="1.0 (4035a4f, 2020-05-01)"
   id="svg8"
   version="1.1"
   viewBox="0 0 215.9 279.4"
   height="11.0in"
   width="8.5in">
  <defs
     id="defs2" />
  <sodipodi:namedview
     inkscape:document-rotation="0"
     inkscape:window-maximized="1"
     inkscape:window-y="322"
     inkscape:window-x="0"
     inkscape:window-height="878"
     inkscape:window-width="1440"
     borderlayer="true"
     inkscape:showpageshadow="false"
     fit-margin-bottom="0"
     fit-margin-right="0"
     fit-margin-left="0"
     fit-margin-top="0"
     showgrid="false"
     inkscape:current-layer="layer1"
     inkscape:document-units="px"
     inkscape:cy="531.93086"
     inkscape:cx="530.94515"
     inkscape:zoom="0.5"
     inkscape:pageshadow="2"
     inkscape:pageopacity="0"
     borderopacity="1.0"
     bordercolor="#666666"
     pagecolor="#474747"
     id="base" />
  <metadata
     id="metadata5">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     sodipodi:insensitive="true"
     transform="translate(146.84374,4.3604197)"
     id="layer1"
     inkscape:groupmode="layer"
     inkscape:label="Background">
    <path
       inkscape:connector-curvature="0"
       id="rect5735"
       d="M -146.78748,-4.3604197 H 69.05626 V 275.03958 h -215.9 z"
       style="opacity:1;fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:3.32587;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" />
  </g>
  <g
     inkscape:label="Layer 1"
     id="layer2"
     inkscape:groupmode="layer" />
</svg>

Inkscape_Default.md

Please copy to user template folder:

~/Library/Application Support/org.inkscape.Inkscape/config/inkscape/templates/

Modified to US Letter Size from: https://logosbynick.com/inkscape-default-template/