title: Change color of placeholder text in QLineEdit
body: <p>When I set the placeholder text with <code>QLineEdit::setPlaceholderText()</code>, it appears gray.</p>
  
  <p><img src="https://i.stack.imgur.com/9JhQC.png" alt="enter image description here"></p>
  
  <p>Is there any way to change the color to something else, for example red?</p>