title: How to change the color of multiple freqz plots?
body: <p>I am plotting multiple frequency responses on the same plot using "hold" and "freqz" in MATLAB. Is there any way to adjust the color of each plot so I can identify which one is which? Right now it looks like a mess. </p>
  
  <p><img src="https://i.stack.imgur.com/h6ozp.png" alt="enter image description here"></p>
  
  <p>Freqz doesn't appear to support changing the plot's color like "plot" does.</p>