title: pyqtgraph: How to color plot axis?
body: <p>I have tried to color the axis of a pyqtgraph plot in the following line</p>
  
  <pre><code>self.PlotWidget.setLabel('bottom', '...')
  </code></pre>
  
  <p>but this just colors the text from the label.</p>
  
  <p><img src="https://i.stack.imgur.com/gmtIQ.png" alt=""></p>
  
  <p>So my question is, is there a possibility to color just the black background of the plot?</p>
  
  <p>Thanks for your answers!</p>