title: Partial coloring of text in matplotlib
body: <p>Is there a way in matplotlib to partially specify the color of a string?</p>
  <p>Example:</p>
  <pre><code>plt.ylabel(&quot;Today is cloudy.&quot;)
  </code></pre>
  <p>How can I show &quot;today&quot; as red, &quot;is&quot; as green and &quot;cloudy.&quot; as blue?</p>