default_polygon.sld

<StyledLayerDescriptor version="1.0.0" xmlns:xsi="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
  <NamedLayer>
    <Name>foo</Name>
    <UserStyle>
      <FeatureTypeStyle>
    <Rule>
      <Name>Class given in default</Name>
      <PolygonSymbolizer>
        <Fill>
          <CssParameter name="fill">#95F9D6</CssParameter>
        </Fill>
        <Stroke>
          <CssParameter name="stroke">#2AAB7E</CssParameter>
          <CssParameter name="stroke-width">1</CssParameter>
        </Stroke>
      </PolygonSymbolizer>
    </Rule>
      </FeatureTypeStyle>
    </UserStyle>
  </NamedLayer>
</StyledLayerDescriptor>