title: Styling a custom spreadsheet menu item using Google Apps Script
body: <p>I have a custom menu on a Google Sheets:</p>
  
  <pre><code>function onOpen() {
    var ss = SpreadsheetApp.getActiveSpreadsheet();
    var csvMenuEntries = [{name: "Save as CSV file", functionName: "saveAsCSV"}];
    ss.addMenu("Save New Emails", csvMenuEntries);    
  }
  </code></pre>
  
  <p>I would like to style the menus I create. </p>
  
  <p>Is this possible and how would one go about it?</p>
  
  <p>All I really want to do is have a custom colour or background for the button to make it stand out. </p>