title: Color bar but just in one case
body: <p>I use this code to have different color for the bar but ...</p>
  <pre><code>color_bar = close &gt; upperk ? #00c3ff : close &lt; lowerk ? #ff0062 : color.gray
  </code></pre>
  <p>I want just keep the case of the GRAY color.</p>
  <p>I don't want to change the color of the bar in the &gt; and &lt; case.</p>
  <p>Triyng with transp or delete the 2first case but error message.</p>
  <p>Thanks for your help</p>
  <p>Have a good day</p>