title: How to change redact color
body: <p>I'm using <code>itext 7.1.8</code> and I need to change the redact color but when I'm trying to do it the color doesn't change.
  My code looks like the following:</p>
  <pre class="lang-java prettyprint-override"><code>PdfReader reader = new PdfReader(new FileInputStream(pdfDoc));
  PdfWriter writer = new PdfWriter(new FileOutputStream(&quot;ResultFile.pdf&quot;));
  PdfDocument doc = new PdfDocument(reader, writer);
  final PdfPage page = doc.getFirstPage();
  final float[] borderColorBlack = { 0, 0, 0 };
  
  PdfAnnotation redact = new PdfRedactAnnotation(new Rectangle(1, 1, 37, 20))
      .setTitle(new PdfString(&quot;&quot;))
      .setColor(new float[] {0, 0, 0})
      .setFlag(PdfAnnotation.TOGGLE_NO_VIEW)
      .put(PdfName.Subj, PdfName.Redact)
      .put(PdfName.OC, new PdfArray(borderColorBlack));
  
  page.addAnnotation(redact);
  PdfCleanUpTool cleaner = new PdfCleanUpTool(doc, true);
  cleaner.cleanUp();
  doc.close();
  </code></pre>
  <p>How can I change the redact color area?</p>