title: Manual set up colormap for color-bar Matplotlib
body: <p>I would like to create the following colormaps.</p>
  
  <pre><code>mycolorbar1 =  [dark-violet light-green dark-red dark-blue]
  
  mycolorbar2 =  [dark-brown dark-red]
  </code></pre>
  
  <p>then I can use them in the following part of my code.</p>
  
  <pre><code>plt.tricontourf(triang1, Z1,v1,cmap=mycolorbar1, norm=plt.Normalize(vmin=v1mi,vmax=v1ma))
  
  plt.tricontourf(triang2, Z2,v2,cmap=mycolorbar2, norm=plt.Normalize(vmin=v2mi,vmax=v2ma))
  </code></pre>
  
  <p>I really appreciate your help and assistance. </p>