 If a matrix
    matching the dimensions of the data is provided, each data element
    will receive the specified color.</p></dd>

  <dt id="arg-col-rownames-col-colnames">col.rownames, col.colnames<a class="anchor" aria-label="anchor" href="#arg-col-rownames-col-colnames"></a></dt>
<dd><p>Colors for row names and column
    names, respectively.  Either may be specified as a scalar or a
    vector of appropriate length.</p></dd>

  <dt id="arg-tab-width">tab.width<a class="anchor" aria-label="anchor" href=