de>: 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></div>
    <div class="section level2">
    <h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>This function serves a very simple purpose, mainly for
<cod