    <th>col_legend_nrow</th>
      <td><p>The number of rows in the legend.</p></td>
    </tr>
    <tr>
      <th>col_na</th>
      <td><p>TRUE or FALSE of whether to include col_var NA values. Defaults to TRUE.</p></td>
    </tr>
    <tr>
      <th>col_rev</th>
      <td><p>TRUE or FALSE of whether the colour scale is reversed. Defaults to FALSE. Defaults to FALSE.</p></td>
    </tr>
    <tr>
      <th>col_title</th>
      <td><p>Colour title string for the legend. Defaults to NULL, which converts to sente