>
<dd><p><code>character</code> string that defines the output of this
function:</p><ul><li><p><code>vector</code>: two colors for every input color in <code>x</code></p></li>
<li><p><code>matrix</code>: two rows, input colors on first row, output colors
on second row</p></li>
<li><p><code>list</code>: a <code>list</code> with two colors in each element, with input
and output colors together in each vector.</p></li>
</ul></dd>


<dt id="arg-debug">debug<a class="anchor" aria-label="anchor" href="#arg-debug"