title: Jupyterlab: Is it possible to change cell colors depending on a metadata tags?
body: <p>I use Jupyter Lab (2.0.1) notebooks for creating exercises and exams. The files contain both the questions and the solutions.
  I marked the cells of the solutions with a "Solution" tag. When exporting with nbconvert I can now choose between output with or without solutions:</p>
  
  <pre><code>nbconvert  --to html --TagRemovePreprocessor.remove_cell_tags=['Solution']
  </code></pre>
  
  <p>What I am missing: I would have displayed all solution cells in <strong>inside</strong> JupyterLab marked with a color frame (or colored background).
  So you can easily distinguish during editing normal cells from cells with solutions. See picture.
  Does anyone have an idea how something like this could work?</p>
  
  <p><a href="https://i.stack.imgur.com/IKOal.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IKOal.png" alt="jupyterlab tag example"></a></p>