mage is returned with suitable updates per your expression.</p>

<p>The expression can be simple:</p>

<pre class="p-3 mb-2 text-body-secondary bg-body-tertiary cli"><samp>magick -size 64x64 canvas:black -channel blue -fx "1/2" fx_navy.png
</samp></pre>

<p>Here, we convert a black to a navy blue image:</p>

<ul>
  <a href="../images/black.png"><img src="../images/black.png" width="64" height="64" alt="black" /></a>
  <img style="margin-top:22px; margin-bottom:22px;" src="../images/right.gif" width="20" hei