title: Prettier default plot colors in matplotlib
body: <p>The default colors used in matplotlib (example here: <a href="http://matplotlib.org/examples/pylab_examples/pie_demo.html" rel="noreferrer">http://matplotlib.org/examples/pylab_examples/pie_demo.html</a>) are kind of plain and ugly. I've also noticed that if you plot more than 5-6 different series in a single plot, matplotlib starts repeating colors.</p>
  
  <p>I've seen some gorgeous graphs coming out of other visualization packages (in other languages, by default) that can have 5-6 different series covered by just one color in different shades. Does anyone have a good color set to use in matplotlib? And a way to make matplotlib use it by default?</p>