title: Black points in scatter plot
body: <p>This is likely an elementary question, but I can't figure out how to plot black points in a scatter plot!</p>
  
  <pre><code>import matplotlib.pyplot as plt
  x = range(255)
  y = range(255)
  color = range(255)
  plt.scatter(x, y, c=color)
  </code></pre>
  
  <p>This does not result in black dots!</p>