<html>
  <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <p>Hi,<br>
      I am using <code>memoir</code> and <code>showtrims</code> as an
      option.
      using <code>\onepagecolor</code> makes the trims disappear.
      Any ideas?</p>
    <p>Here is a MWE:<br>
    </p>
    <br>
    <pre style="" class="lang-tex prettyprint prettyprinted"><code><span class="kwd">\documentclass</span><span class="pun">[</span><span class="lit">12pt</span><span class="pln">,showtrims</span><span class="pun">]{</span><span class="pln">memoir</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\usepackage</span><span class="pun">{</span><span class="pln">lipsum</span><span class="pun">}</span><span class="pln">

</span><span class="kwd">\usepackage</span><span class="pun">{</span><span class="pln">xcolor</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\setstocksize</span><span class="pun">{</span><span class="lit">290mm</span><span class="pun">}{</span><span class="lit">210mm</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\settrimmedsize</span><span class="pun">{</span><span class="lit">240mm</span><span class="pun">}{</span><span class="lit">170mm</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\settrims</span><span class="pun">{</span><span class="lit">20mm</span><span class="pun">}{</span><span class="lit">20mm</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\settypeblocksize</span><span class="pun">{</span><span class="lit">180mm</span><span class="pun">}{</span><span class="lit">110mm</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\setlrmargins</span><span class="pun">{</span><span class="lit">20mm</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\setulmargins</span><span class="pun">{</span><span class="lit">20mm</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}{</span><span class="pln">*</span><span class="pun">}</span><span class="pln">

</span><span class="kwd">\usepackage</span><span class="pun">{</span><span class="pln">pagecolor</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\usepackage</span><span class="pun">{</span><span class="pln">afterpage</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\newcommand</span><span class="pun">{</span><span class="kwd">\onepagecolor</span><span class="pun">}[</span><span class="pln">1</span><span class="pun">]{</span><span class="com">%</span><span class="pln">
</span><span class="kwd">\newpagecolor</span><span class="pun">{</span><span class="pln">#1</span><span class="pun">}</span><span class="kwd">\afterpage</span><span class="pun">{</span><span class="kwd">\restorepagecolor</span><span class="pun">}}</span><span class="pln">

</span><span class="kwd">\begin</span><span class="pun">{</span><span class="pln">document</span><span class="pun">}</span><span class="pln">

</span><span class="kwd">\trimFrame</span><span class="pln">
</span><span class="kwd">\lipsum</span><span class="pun">[</span><span class="pln">1</span><span class="pun">]</span><span class="pln">
</span><span class="kwd">\newpage</span><span class="pln">
</span><span class="kwd">\onepagecolor</span><span class="pun">{</span><span class="pln">green</span><span class="pun">}</span><span class="pln">
</span><span class="kwd">\lipsum</span><span class="pun">[</span><span class="pln">1</span><span class="pun">]</span><span class="pln">

</span><span class="kwd">\end</span><span class="pun">{</span><span class="pln">document</span><span class="pun">}</span></code></pre>
  </body>
</html>