title: How to draw points with bright colors in an image with Pillow/PIL library
body: <p>I'm implementing a basic crowd dynamic software. At each timestep, all people inside a rectangular area with exits is evolved in the direction pointed by the model. The output at each timestep shall be printed to an image. I did not have big issues in drawing the area as a rectangle and the people as points, but now I'd need to give each point a color based on the speed of the person it represents.</p>
  
  <pre><code>if(vel == 3):
      draw.point((xp, yp), fill='blue')
  
  elif vel == 2:
      draw.point((xp, yp), fill='red')
  
  elif vel == 1:
      draw.point((xp, yp), fill='green')
  </code></pre>
  
  <p>I get the following jpg file:
  <a href="https://i.stack.imgur.com/RMDxP.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RMDxP.jpg" alt="enter image description here"></a></p>
  
  <p>As you can see, it is very difficult to tell the difference between each point. 
  Do you have hints in how to make the colors much brighter? Also suggestions on different ways to "output" the results are  welcome.
  Thank you!</p>